#dioptric

[fieriframes]

[Dioptric.]

[getoo]

i'm scared i just made an appointment for the optician to try contact lenses but in order to do that i need to check my eyesight first and the last time i did was a bit over a year ago if it changed enough i need new glasses i'll probably cry

[linejartist]

FAR FROM GRACE

(part 11)

THE ALLIES

Eventually, Sam and Charlie took turns sleeping on the couch. This Den was probably one of the hackers' safe havens, as no one seemed to be trying to kick them out.

Charlie sat back down at her laptop and went looking for any information that would be useful for the eventual war with the BMoL, which was already seriously… not so much about coming as already here with a massive BOOOM.

Sam lay down on the couch, which was even so long that his legs didn't hang over the edge when he really stretched out.

He knew in advance that he wouldn't sleep very well because of the furious planning going on in his head. And worries about his brother - those were the worst.

"You look like a lost puppy," Charlie stated as she glanced back at him briefly.

It was a statement that probably didn't require a response, so Sam just grunted softly and closed his eyes.

When he opened them again, it was already morning. There was a stack of printed papers on the table next to the laptop. Charlie looked like an owl forced to be awake during the day. Beside her sat a large mug of either coffee or cocoa and a plate of waffles with maple syrup. Another, identical plate was standing next to it, obviously waiting for Sam.

He had to give up his daily routine of going for a run and then taking a shower. Instead, he settled his body on the chair at the table and peered at the papers.

"Thanks… well, for everything," he muttered, narrowing his eyes. "Is that the stuff about BMoL?"

“Yeah. Everything that could be found out. For those projects, I guess you copied it, I didn't print it."

"You're the best," Sam smiled as he started to breakfast.

"I know," Charlie smiled and started eating too. “Um, hi uen heup,” she mumbled after a moment, wiped her mouth with a napkin, swallowed, and then repeated it more clearly: “I can help. With that... Thing. And otherwise."

But Sam shook his head. This was already risky. If they found out about Charlie, it wouldn't end well.

"I just need you to be IT support," he declared. “Even that is… A lot. I can handle some things, but you're just a shark.”

"I like that," Charlie nodded. Shooting at someone, in real life, she probably wouldn't be mentally prepared for that anyway, and she suspected that blood would flow here and corpses would pile up. "Alright, anytime feel free to contact me if needed."

Sam nodded and thanks her one more time. Breakfast with Charlie was fine, Charlie herself was fine, but a lot of things were bothering him now.

BMoL were everywhere. Maybe not here, in Charlie's Den, but like an octopus grasping for its prey, they reached out with their tentacles into government and security forces, they had their people in airports and among the Hunters, there was so many ways to hide from them.

On the one hand he admired them, they were doing a seriously perfect job of taking out the monsters, but on the other hand... Were they exaggerating?

They definitely crossed the line by imprisoning and enslaving people in that facility.

All in all, this was supposed to be another war of independence.

He knew there were plenty of Hunters who would join him, but right now he had something else planned. If he gathered a group of Hunters, they might be the best, but they would still only be humans. And this was big.

He said goodbye to Charlie, leaving her some money despite her protests, not for help, but for bed, drinks and breakfast.

When he got out, he was a little confused for the first few seconds, automatically looking for the Impala before his senses caught up and told him that he now had a jeep.

He found the cap again, this time he decided to grow a beard and maybe get some glasses, not dioptric, of course, so Dean could laugh. He hoped Dean would laugh.

His stomach clenched at the thought of his brother, he couldn't imagine how Dean… Well, they had a case in prison once, and Dean fit in pretty well, but this was a different case.

If there was one thing the BMoL weren't known for, it was kindness and a nice attitude.

It was a stupid idea for Dean to go there in the first place, but in the end at least he revealed that the whole Cobalt Valley project stinks.

Sam now had to decide which was the greater evil. Actually, it wasn't that difficult, thanks to BMoL's interventions, neither demons nor angels posed any significant problem for a long time. Lucifer was rotting in the Cage with Michael and it was going to stay that way, and whoever was in command of Heaven and Hell now certainly wasn't up to any big action. Taking BMoL out of the equation might change this, but there were deals. And a properly concluded agreement could not be violated by either party.

Therefore, his path now led to one of the last safe havens that he knew the BMoL had no idea about.

A cabin in the woods, no electricity, hidden by a bit of magic, just enough so it wouldn't show up on radar.

He stopped the jeep at the edge of the forest, away from the road. He hid it behind a thick bush to be safe so it wouldn't be so noticeable.

He then walked to the cabin, carrying everything he needed in his bag. It chilled him a little about his own plan, but it basically worked out as the only option for him to get Dean out of this, even on paper, terrifying prison.

If Dean were here now, he probably wouldn't have lost a chance for the Prison Break references, he would have advised Sam to get a cleverly hidden escape plan tattooed on his body, but... Dean wasn't here.

On the way, Sam wondered if he would be trying so hard if it was just about angels and demons. Or at least only about angels, who can be really dicks too, but still…

He shook his head, nearly tripping over a jutting root. He concentrated only on the road for a while, quite a while, practically before he reached the cabin.

Then he was not going to delay anything, he just started a fire in the stove. The temperature didn't drop below freezing, but he wasn't going to shiver here anyway.

It was enough what he wanted to do, it could actually end up being the hunting equivalent of the Chernobyl accident.

First he decided to summon the lesser evil. Angel. Whatever, he didn't have a precise focus on a name, and he just hoped that even without a fire trap, the heavenly representative wouldn't burn him to the ground. He wouldn't be too surprised. Since the start of the collar event, he and Dean have caught and turned in maybe eight or nine angels.

He prepared the appropriate symbols, prepared a bowl of ingredients which he lit, and with a carefully calm face he waited until the wood seemed to burn brighter in the stove and the angel appeared.

He wasn't particularly tiny, his vessel, but at least a head smaller against Sam. He had an expression on his face that seemed incredibly sarcastic even before he said anything. Brown hair, stubble on his face.

Fortunately, contrary to Sam's bad expectation, he didn't attack right away, he just scanned him from head to toe and smirked.

“Sam Winchester. Where is your ring of fire, where is your Man of Letters, and above all, where is your brother?” he asked before Sam could say anything.

Sam wanted to say he wasn't the enemy, but he was painfully aware that that was exactly what Castiel had tried to convince them of before they handed him over to the BMoL.

"That's the point," he said quietly. “I have no intention of catching you, I am no longer working with BMoL. On the contrary, I want to free… Well, our brothers.”

"That is the thing, you played with fire and burned yourself?" the angel asked, looking quite interested. He walked over to a shabby chair and sat down. “I'm Balthazar, by the way. And don't you dare to call me Balty," he threatened Sam with a finger, then rested his chin. "I'm listening."

"I have to call someone else first," Sam said thoughtfully. “Sorry. I don't want to say it all twice.”

The united forces of Heaven, Hell and the Internet.

Balthazar folded his arms across his chest, looking displeased but probably thinking something like “The enemy of my enemy…”

He must have already deduced something from that sentence about brothers. Maybe not all, but enough to make him wait patiently now.

Sam performed all the necessary actions to summon the demon. With neither the demon nor the angel, Sam had no idea if they were valid representatives of either side, but he hoped someone would show up who would at least have a say.

And a guy in a suit appeared, with black hair and a beard. Sam recognized him almost immediately because the BMoL had him listed as untouchable - the current ruler of Hell, Crowley.

The demon looked around, frowning. He had already dealt with BMoL and the Winchesters, at least enough to give the brothers mocking nicknames.

"Where's your Squirrel, Moose?" demon asked in a slightly strained voice. “You two are like conjoined twins. And what is the winged numbskull doing here?”

"He must be looking at an pretty ugly demon," Balthazar snapped and Sam held up both hands, he seriously didn't need a Heaven and Hell war to break out here.

"We have to work together," he blurted out, gesturing to a couch as shabby as everything in this cabin for Crowley to sit down.

“All… well, we're all stand against BMoL now. Dean ended up in that prison of theirs, and long story short… We didn't know about it.”

He looked at the angel and at the demon, who then sat down with a hostile expression.

"You thought BMoL was sending angels and demons to the Bahamas to relax?!" Crowley growled. "With those fancy collars around their necks to better enjoy Sex on the Beach?"

"We didn't know what was going on," Sam repeated once more as if it was a valid apology. “And now I know, the BMoLs are after me as they are after you and we need… Uhm. We need to team up.”

“Like heaven is supposed to cooperate with demons?” Making sure he understood, Balthazar gave Crowley a disgusted look.

"Exactly," Sam nodded and the demon chuckled disdainfully, but he wasn't gone yet and neither was the angel. That was quite an succes.

“The facility is so hidden that even all the angels put together cannot find it. Neither do I,” Balthazar grumbled, looking a little uncomfortable to be talking about this incompetence in front of Crowley. But Crowley spoke up too: “Same with us. What exactly is this about, Moose? Huh?”

"The thing is, I have the exact location of the…Prison," Sam drew out with a trump card. “And I don't want it to end with us just freeing… Well, prisoners. I want BMoL to end here. They do… They are responsible for more bad than good.”

Balthazar straightened and began to clap slowly, ironically.

"Sam Slow-understanding Winchester," Crowley grunted, but he seemed interested despite the remark. “Well, we free the supernatural Alcatraz, so what? Will the American colonies fight another war for independence? And Heaven and Hell will fight on the side of the brilliant and unique Winchester brothers?”

Sam swallowed hard and tried to hold back a shrug. He just hoped that both angels and demons would go for it—at least for freeing the prisoners from Cobalt Valley.

The BMoL had its colonies all over the world, well yes it looked like another British colony, but Sam would be fine if he managed to get them out of America to begin with. From the US - that would be enough. Of course, that would mean giving up technological progress and all, besides, he had them to thank for getting him out of the Hell's Cage, but he maintained that they were a far greater evil than a return to the old ways.

It wasn't just the Cobalt Valley project, he only had to look at other secret projects and it made him sick. Because BMoL wasn't so much trying to rid the world of monsters as finding a way to use them.

And finally Sam nodded.

"Exactly."

Balthazar leaned back in his chair, there was still no sound of wings beating in the air, and he stayed, which gave Sam hope.

Crowley didn't disappear either.

Sam laid out the papers and his notebook with the details on the table.

"I have enough information, and I can get more," he said. "Now I want to plan with you exactly how we're going to do it, and I want to solidify it with a cooperation agreement."

Balthazar got up but still didn't disappear, he just moved to the table and looked at the papers.

"It's crazy," he stated, looking at Sam inquisitively. "I like it."

"Damn it," Crowley grunted, shaking his head but then joining in as well. “It's bloody crazy, and I don't like it, but… I suppose I have some demons to spare. Hell is in.”

[rjjameshiii]

RJ's Platinum Collection #34: Life is Strange

Achieved on 7/22/2023 at 12:11 AM

I first played Life is Strange back when it came out on PC, and then I played it again back on my old PS4. You'd think playing a game twice would be enough?

Nope! I decided to once again play Life is Strange on my PS5, but this time I was gonna get the Platinum trophy. That's how much I love the story of Life is Strange!

And guess what? I got this Platinum all in one day.

Life is Strange puts you in the shoes of Max Caulfield, a student at a fancy boarding school who aspires to be a famous photographer. One day, Max witnesses her childhood friend Chloe being murdered, and discovers she has the power to rewind time, which she uses to go back and save Chloe. Max and Chloe end up using Max's powers to investigate the mystery behind the disappearance of Chloe's friend Rachel - and the origins of a mysterious apocalyptic storm that Max has visions of devastating the town of Arcadia Bay.

Ok, so I'm not even gonna pretend that this Platinum isn't insanely easy. All you got to do is make sure to find all 10 optional opportunities for Max to take pictures of stuff in each of the game's five episodes. I just used the trophy guide on PSN Profiles, snapping up all the optional photographs as they came along, while also enjoying the story, which I ended up playing through in its entirety in less than a whole day. I started at about 11:30 in the morning, and by the time I finished the game and unlocked the Platinum trophy, it was eleven minutes past midnight that same night.

1/61: Macro Eyes - Take optional photo #1 in Episode 1.

2/61: Wide Angles - Take optional photo #2 in Episode 1.

3/61: Telephotogenic - Take optional photo #3 in Episode 1.

4/61: Close-Ups - Take optional photo #4 in Episode 1.

5/61: Red Eye - Take optional photo #5 in Episode 1.

6/61: Focused - Take optional photo #6 in Episode 1.

7/61: Zoomed In - Take optional photo #7 in Episode 1.

8/61: Focal Pointed - Take optional photo #8 in Episode 1.

9/61: Maximum Aperture - Take optional photo #9 in Episode 1.

10/61: Light Leak - Take optional photo #10 in Episode 1.

11/61: Visionary - Take all optional photos in Episode 1.

12/61: Chrysalis - Complete Episode 1: "Chrysalis".

13/61: Field of View - Take optional photo #1 in Episode 2.

14/61: Full Exposure - Take optional photo #2 in Episode 2.

15/61: Processor - Take optional photo #3 in Episode 2.

16/61: Image Stabilizer - Take optional photo #4 in Episode 2.

17/61: Compressed - Take optional photo #5 in Episode 2.

18/61: Pixelated - Take optional photo #6 in Episode 2.

19/61: Dynamic Range - Take optional photo #7 in Episode 2.

20/61: Colorized - Take optional photo #8 in Episode 2.

21/61: Meter Made - Take optional photo #9 in Episode 2.

22/61: Resolution Revolution - Take optional photo #10 in Episode 2.

23/61: Lab Master - Take all optional photos in Episode 2.

24/61: Out of Time - Complete Episode 2: "Out of Time".

25/61: Parallax View - Take optional photo #1 in Episode 3.

26/61: Lenscrafted - Take optional photo #2 in Episode 3.

27/61: The Reflex - Take optional photo #3 in Episode 3.

28/61: Histogrammar - Take optional photo #4 in Episode 3.

29/61: Bokeh - Take optional photo #5 in Episode 3.

30/61: Pinholed - Take optional photo #6 in Episode 3.

31/61: RAW Strength - Take optional photo #7 in Episode 3.

32/61: Viewfinder - Take optional photo #8 in Episode 3.

33/61: Optican - Take optional photo #9 in Episode 3.

34/61: Flash! - Take optional photo #10 in Episode 3.

35/61: Camera Eye - Take all optional photos in Episode 3.

36/61: Chaos Theory - Complete Episode 3: "Chaos Theory".

37/61: Ambient - Take optional photo #1 in Episode 4.

38/61: Time-Lapsed - Take optional photo #2 in Episode 4.

39/61: Balance - Take optional photo #3 in Episode 4.

40/61: Rangefinder - Take optional photo #4 in Episode 4.

41/61: Gamma Value - Take optional photo #5 in Episode 4.

42/61: Dioptric Power - Take optional photo #6 in Episode 4.

43/61: Fisheye - Take optional photo #7 in Episode 4.

44/61: Manually Exposed - Take optional photo #8 in Episode 4.

45/61: Slideshow - Take optional photo #9 in Episode 4.

46/61: Tripod - Take optional photo #10 in Episode 4.

47/61: Shutterbug - Take all optional photos in Episode 4.

48/61: Dark Room - Complete Episode 4: "Dark Room".

49/61: Incandescent - Take optional photo #1 in Episode 5.

50/61: Night Vision - Take optional photo #2 in Episode 5.

51/61: Framed - Take optional photo #3 in Episode 5.

52/61: Camera Obscura - Take optional photo #4 in Episode 5.

53/61: Blowup - Take optional photo #5 in Episode 5.

54/61: Iris - Take optional photo #6 in Episode 5.

55/61: Sensor - Take optional photo #7 in Episode 5.

56/61: On Display - Take optional photo #8 in Episode 5.

57/61: Light Meter - Take optional photo #9 in Episode 5.

58/61: Silhouettes - Take optional photo #10 in Episode 5.

59/61: Selfie Awareness - Take all optional photos in Episode 5.

60/61: Polarized - Complete Episode 5: "Polarized".

61/61: What If? - Unlock all trophies in Life is Strange.

If you're going for the Life is Strange Platinum, it's one of the easiest Platinums you can do. There are no major story-based trophies, so you can play the game however you want. All you gotta do is make sure to pick up all the optional photographs.

I love Life is Strange. It's dialogue is super dated, and it's not perfect, but I still think it has one of the best stories in video games.

Rating: 9/10

[spotsupstuff]

Does fish need his glasses to see or anything or are they just decorative?

the glasses Are dioptric, but only cuz the kids bought him those cuz they didn't know better. they saw big round golden glasses and thought the shape would drive in the point of him being a mega nerd well and the color would match good with his fins/antennas. didn't know what dioptric meant at all

so he's just fine without them!

though when he does wear them he has to adjust his cameras so he Can actually see through them. so taking them off Is gon make him squint @ things still. so decorative intention but still affecting his puppet

he Is disabled a lil though, but mentally. i'mma talk about it here cuz i think it's a fun piece of worldbuildin on itties- that revelation did actually physically fuck him up. he has an iterator version of epilepsy

epilepsy, as explained to me by wikipedia, is abnormal, excessive and unprovoked electrical discharge in neurons. for iterators this doesnt necessarily mean seizure but it does mean that they go completely blank and freeze up and forget things. since electricity can get wild in them i also imagine that a lot of neuron flies can get crippled or damaged beyond their ability to normally function. so his internal facilities have to compensate for that and create more neurons. he's tired sometimes and thinking gets hard. which is shitty since he does like to think about things

he also has vocal ticks that are rooted in the epilepsy damage (feels the need to validate himself and affirm what he is talking/thinking about aloud)

(excuse mua, it be old old ass art.....)

when he has someone there to talk with the vocal ticks are less common. so Tinktink is a lil bit of a therapy animal in that aspect i guess gjlsdmclksdlk in the off string post-MA au he still buzzes and dings, but since he's rarely without Someone annoying him, it becomes more part of his way to communicate things. nobody really finds That weird, though getting buzzed out of nowhere Has offended some people quite a few times

[dailylighthouse]

I should study fresnel lens shapes...

Like yeah i know the orders but theres different lens/prism configurations

I wanna walk into a museum and be like "ah! A 2nd order double dioptric!" Or something like that (please dont kill me idk the words yet)

[prasad213]

Laser Operation For Eyes Cost In Mumbai

Lasers

Lasers are used in a throng of conditions for the retina. Retinal photocoagulation is the mechanism of action for a retinal laser treatment. In this marvel, light energy is converted to heat at the level of the retina, leading to protein denaturation during the retina laser surgery.

Indications

LASIK indicates the correction of low, moderate, and high myopia with and without astigmatism. The specific dioptric limits depend on the particular laser system and the regulatory agency of each country.

Proliferative Diabetic Retinopathy: PDR is an advanced stage of diabetic eye disease. It occurs when the retina starts developing new blood vessels within itself. This is also called neovascularization.

Diabetic Macular Edema: DME is the accumulation of extra fluid in the extracellular space within the retina in the macular area, generally in the subretinal space, inner nuclear, Henle's fiber layer, and outer plexiform.

Vascular Occlusion: A vascular occlusion occurs when blood can no longer pass through a blood vessel.

Central Serous Chorioretinopathy: Central serous chorioretinopathy (CSC) is a retina disease characterized by serous detachment of the neurosensory retina secondary to one or more focal lesions of the retinal pigment epithelium (RPE).

Retinal Breaks: detachment is an emergency. Tissue at the rear end or the back of the eye pulls away from a layer of blood vessels that provide necessary nourishment and oxygen. It may happen in the retinal periphery. The retina is sometimes torn away by the vitreous gel because of pulling.

Mechanism of Action

Retinal disease is primarily treated using a retina laser. The light energy is absorbed by particular tissue at the back of the eye and transformed to heat with this laser. The heat causes a tiny area of damage to the retina. As the eye heals from this small area of damage, the scar helps to correct the underlying retinal disease. Retina laser is used to seal retinal tears, close leaking blood vessels, or break down abnormal tissue or blood vessels.

Direct action on the vessels

Closure and reduced leakage

Scarring + Burns of the layers of the retina

Reduced oxygen demanded

Increased oxygenation of the inner retina

Photocoagulation

Retinal cell activation

Cytokine production

Reduction of vascular growth factor + Edema

Types of Lasers

Green (Argon) laser

Yellow laser:Sealing the leaky blood vessels

Photodynamic laser:Using a drug (Visudyne) + Red laser. This is used to seal abnormal and leaking retinal vessels.

Yag Laser:This type of laser is used to create a opening of the membrane that is frequently formed on the implanted intraocular lens.

[lindahaley123]

ENT Kit AM-ESA13

Abimed ENT Kit features 12 instruments, including an otoscope with tips (2.4–5mm), ophthalmoscope, nasal speculum, Ben arm illuminator, battery handle, laryngeal mirrors, 19 dioptric lenses -20D to +20D, and an LED-lit, metal-constructed LCD handle with adjustable brightness.

[valeriesbg]

Check out this listing I just added to my Poshmark closet: BRESSER 8x42 Hunter Specialties Primal Series Binoculars.

[jimmanueljoseph]

Renihilation/Aesthethica

13.8.24Lumen naturale (dioptric) → Lux aeterna (catoptric) > > Lumen naturaleSelf-negating representationSynthetic, systematic theory of everythingmistmare Word. Chef. Heard.Black-on-black Consciousness ~ knowledge = Light ~ visionFrom negative experiences to the negativity of experienceOptical > > visibleWhere did colour take place?Utriusque cosmi Color theory & retinal pessimismThere is nothing…

[mushkoko]

Summer report: June, July and August. Love jean shorts, dresses and skirts - not so much. Total of 57 items. Most worn, 10+ times: Blue short jeans H&M: 10 Blue baggy jeans Stradivarius: 10 Black/red/white Diesel hi-tops: 10 Sunglasses Marc Jacobs: 12 Black short pants Miki: 14 Black/white short linen jacket Silvian Heach: 15 Sunglasses No Brand No name: 15 Black backpack Everlast: 15 Anthracite short jeans H&M: 17 Black backpack Musette: 17 White leather sneakers Nike N. 354: 24 Black bum bag NB: 25 Black belt Urban Outfitters: 27 Transparent dioptric glasses Guess: 28

[kinhmatdaintydots]

Mắt kính lão loại nào tốt nhất cho cuộc sống hiện đại?

Trong cuộc sống hiện đại, việc sử dụng mắt kính lão trở nên phổ biến không chỉ đối với người lớn tuổi mà còn với nhiều người trẻ. Việc lựa chọn loại mắt kính phù hợp không chỉ cải thiện tầm nhìn mà còn góp phần nâng cao chất lượng cuộc sống. Bài viết này sẽ giúp bạn hiểu rõ hơn về các loại mắt kính lão phổ biến, những yếu tố cần cân nhắc khi chọn kính, và cách chăm sóc chúng để đảm bảo độ bền và hiệu quả sử dụng.

I. Các loại mắt kính lão phổ biến

Mắt kính đơn tròng

Mắt kính đơn tròng là loại kính có một độ dioptri duy nhất trên toàn bộ bề mặt kính. Loại kính này thường được sử dụng cho những người cần hỗ trợ thị lực ở một khoảng cách nhất định, chẳng hạn như đọc sách hoặc làm việc gần. Độ dioptri của kính đơn tròng được điều chỉnh để phù hợp với nhu cầu cụ thể của người đeo, giúp cải thiện tầm nhìn ở khoảng cách gần hoặc xa.

Ưu điểm:  

Chi phí thấp: Kính đơn tròng thường có giá thành thấp hơn so với các loại kính đa tròng hoặc hai tròng, do cấu trúc đơn giản và ít yêu cầu kỹ thuật sản xuất.

Dễ dàng thích nghi: Người dùng dễ dàng làm quen với kính đơn tròng vì không có sự thay đổi đột ngột trong độ diop tri khi di chuyển mắt qua lại trên kính.

Tính chính xác cao: Với chỉ một độ dioptric, kính đơn tròng cung cấp sự điều chỉnh thị lực chính xác cho một khoảng cách cụ thể, giúp người đeo nhìn rõ ràng mà không bị phân tâm bởi các vùng nhìn khác nhau.

Nhược điểm:  

Hạn chế trong việc nhìn ở nhiều khoảng cách: Kính đơn tròng không thể điều chỉnh để nhìn rõ ở nhiều khoảng cách khác nhau. Điều này đặc biệt bất tiện cho những người cần chuyển đổi liên tục giữa việc nhìn xa và gần, chẳng hạn như khi lái xe và đọc tài liệu.

Không phù hợp cho người lão thị: Người lão thị thường cần hỗ trợ thị lực cho cả nhìn xa và gần. Kính đơn tròng chỉ có thể đáp ứng một trong hai nhu cầu này, khiến người dùng phải thay đổi kính hoặc cởi kính khi cần nhìn ở khoảng cách khác.

Không linh hoạt: So với kính đa tròng, kính đơn tròng thiếu tính linh hoạt và đa năng, đặc biệt trong các hoạt động hàng ngày đòi hỏi sự thay đổi liên tục về khoảng cách nhìn.

Mắt kính đa tròng

Mắt kính đa tròng, hay còn gọi là kính Progressive, là một bước tiến lớn trong công nghệ kính mắt, cho phép người dùng nhìn rõ ở nhiều khoảng cách mà không cần thay đổi kính.

Đặc điểm:  

- Kết hợp nhiều độ dioptri trong cùng một mặt kính, giúp nhìn rõ ở mọi khoảng cách.

- Không có đường ngăn cách rõ ràng như kính hai tròng, mang lại vẻ ngoài thẩm mỹ hơn.

Ưu điểm:  

- Cung cấp tầm nhìn liên tục từ xa đến gần mà không cần thay kính.

- Thiết kế thẩm mỹ, không bị lộ đường chia cắt giữa các độ dioptri.

Nhược điểm:  

- Giá thành cao hơn các loại kính khác do công nghệ phức tạp.

- Cần thời gian làm quen, đặc biệt là ở những người mới sử dụng.

- Có thể gây hiện tượng “bơi” khi nhìn ngang hoặc di chuyển đầu.

Mắt kính hai tròng

Mắt kính hai tròng là loại kính có hai vùng nhìn rõ ràng với hai độ dioptri khác nhau, thường dành cho người có nhu cầu nhìn xa và nhìn gần.

Đặc điểm:  

- Có một đường ngăn cách rõ ràng giữa hai vùng kính, một cho tầm nhìn xa và một cho tầm nhìn gần.

Ưu điểm:  

- Hiệu quả cho những người cần nhìn xa và gần một cách riêng biệt, chẳng hạn như đọc sách và lái xe.

- Không cần phải thay đổi kính khi chuyển từ nhìn xa sang nhìn gần.

Nhược điểm:  

- Đường chia cách giữa hai vùng có thể gây khó chịu hoặc mất thẩm mỹ.

- Gây hiện tượng nhảy hình ảnh khi chuyển đổi giữa hai vùng nhìn, cần thời gian làm quen.

Mắt kính không tròng

Mắt kính không tròng, hay kính đọc sách không có độ, là lựa chọn đơn giản và dễ dàng cho những người chỉ cần hỗ trợ tạm thời cho việc nhìn gần.

Đặc điểm:  

- Không có độ dioptri cụ thể, thường được mua sẵn tại các cửa hàng mà không cần đo thị lực.

Ưu điểm:  

- Chi phí thấp, dễ dàng mua sắm và sử dụng.

- Phù hợp cho những ng��ời chỉ cần đọc sách hoặc làm việc gần trong thời gian ngắn.

Nhược điểm:  

- Không thể điều chỉnh theo từng cá nhân, không phù hợp với người có nhu cầu thị lực đặc biệt.

- Chất lượng không đảm bảo, có thể gây mỏi mắt hoặc đau đầu khi sử dụng lâu dài.

II. Những yếu tố cần cân nhắc khi chọn mắt kính lão

Thị lực của con người thay đổi theo độ tuổi, đặc biệt là sau tuổi 40 khi hiện tượng lão thị (presbyopia) bắt đầu xuất hiện. Việc lựa chọn kính phù hợp phụ thuộc vào mức độ lão thị và các vấn đề thị lực khác như cận thị, viễn thị.

- Trẻ em và thanh thiếu niên: Thường cần kính đơn tròng hoặc đa tròng cho các vấn đề như cận thị hoặc loạn thị.

- Người lớn tuổi: Cần kính đa tròng hoặc hai tròng để hỗ trợ tầm nhìn xa và gần.

Lối sống và công việc cũng đóng vai trò quan trọng trong việc chọn kính. Những người làm việc văn phòng cần kính chống ánh sáng xanh để bảo vệ mắt khỏi ánh sáng từ màn hình, trong khi những người thường xuyên lái xe cần kính chống chói.

- Người làm việc văn phòng: Cần kính chống ánh sáng xanh để giảm mỏi mắt.

- Người làm việc ngoài trời: Cần kính chống tia UV để bảo vệ mắt khỏi tác động của ánh nắng mặt trời.

Công nghệ sản xuất kính ngày nay đã tiến bộ đáng kể, với các loại kính chống ánh sáng xanh, kính chống chói, kính phân cực, và kính chống tia UV.

- Kính chống ánh sáng xanh: Giảm thiểu tác động của ánh sáng xanh từ màn hình điện tử.

- Kính phân cực: Giảm chói và tăng cường độ tương phản, phù hợp cho việc lái xe và hoạt động ngoài trời.

Kính mắt không chỉ là công cụ hỗ trợ tầm nhìn mà còn là phụ kiện thời trang. Việc chọn lựa khung kính và thiết kế phù hợp không chỉ giúp bạn nhìn rõ mà còn tôn lên phong cách cá nhân.

- Khung kính: Có nhiều loại như kim loại, nhựa, gỗ, mỗi loại mang đến một vẻ đẹp và cảm giác khác nhau.

- Thiết kế: Từ kiểu dáng cổ điển đến hiện đại, phù hợp với mọi lứa tuổi và phong cách thời trang.

Việc lựa chọn mắt kính lão phù hợp không chỉ giúp cải thiện tầm nhìn mà còn góp phần nâng cao chất lượng cuộc sống. Với sự phát triển của công nghệ và sự đa dạng về kiểu dáng, việc chọn lựa kính không còn chỉ dựa vào nhu cầu thị lực mà còn là sự kết hợp giữa tính năng và thẩm mỹ. Hy vọng những chia sẻ trên của Dainty Dots sẽ giúp bạn chọn được mẫu kính phù hợp với nhu cầu của mình nhé.

[webionaire]

The diorama was a 19th century light-based medium that featured two immense paintings lit from the front and through the back inside an otherwise pitch-black, rotating auditorium. The diorama combined techniques of opaque and translucent painting with methods of manipulating natural light in a live spectacle.

The diorama was invented by the set designer and painter Louis-Jacques-Mandé Daguerre (together with the architectural painter Charles Marie Bouton) seventeen years before he perfected the daguerreotype process of photography. The daguerreotype would, in the words of Daguerre, "fix the objects reflected in a camera obscura" (Daguerre 78). In contrast to the photographic impulse, the effectiveness of the dioramic image depended on the constant, visible movement of light manipulated with shutters and screens both onto and through a semi-translucent painting. The in-formation of light was thus performed and experienced in real-time, rather than captured and stored for future purpose. Similarly, the spectator expected the illusion "to represent the effects of nature" (Daguerre 84), not to secure "the objective ground of visual truth" (Crary 14) via camera obscura.

Realism and illusion: the right and wrong sides of the screen

The patent for the first diorama built in London in 1823 describes the device as “an improved Mode of publicly exhibiting Pictures or Painted Scenery of every Description and of distributing or directing the Day Light upon or through them, so as to produce many beautiful Effects of Light and Shade.” As this account indicates, the dioramic picture was both a transparent conduit and an opaque screen, with the effects of light and shade directed both upon and though its substance.

The diorama thus operated according to both catoptric and dioptric principles. As Daguerre describes, “the first effect painted on the right or front of the canvas is lighted by reflection…while the second effect—that painted on the wrong side—receives its light by refraction, that is, from behind only” (Daguerre 83). The right side, facing the spectator, is the realm of the "illusionizing potential of projection, the production of artificial reality" (Zielinski 86). The wrong side belongs to the operator and/or the painter, who performs the catoptric illusion by seeing through it.

The dioramic screen with worker behind and spectators in front, 1848.

On a semiotic level, the "wrong" or dioptric side of the painting was opaque to those who did not possess the knowledge of “dioramic art” (Daguerre 85). Painters schooled in the dioramic technique inscribed the back of the painting with functional nonsense, a language of light and shadow that, in a complete reversal of the painting’s façade, corresponded not the referent of the natural world, but to the forms showing through from the front of the canvas. This secondary inscription would be illegible to the spectator accustomed to representational images. In order to create a heightened illusion of reality, this mode of painting thus broke out of the camera obscura model that relied on a founding referent (Crary 14).

Though, like the mechanically reproduced image, the verso of the dioramic painting was abstracted from a stable, objective referent, the double-sided screen nevertheless divides the complex knowledge of the practitioner of realist illusion from its witness, the spectator. In contrast to the photograph, which, as Walter Benjamin described a century later in his celebration of film, freed the image of the cathedral to “meet the beholder halfway” (Benjamin 220), the image of the cathedral reproduced in the diorama is wrapped not only in the lux of spectacular illusion, but in the aura of an original work authored by a virtuosic artist-scientist.

References

Arrowsmith, John. Diorama Patent, British Patent No. 4899, February 10, 1824. Transcription from http://www.midley.co.uk/.

Benjamin, Walter. Illuminations. New York: Schocken Books, 1968.

Crary, Jonathan. Techniques of the Observer. Cambridge: MIT Press, 1992.

Daguerre, Louis-Jacques-Mandé. An historical and descriptive account of the various processes of the daguerréotype and the diorama. London: McLean & Nutt, 1839.

Debord, Guy. The Society of the Spectacle. Rev. ed. Detroit: Black & Red Books, 1977.

Gernsheim, Helmut and Alison. L.J.M. Daguerre: The History of the Diorama and the Daguerrotype. 2nd Rev. ed. New York: Dover Publications, Inc., 1968.

Schivelbusch, Wolfgang. Disenchanted Night: The Industrialization of Light in the Nineteenth Century. Berkeley: The University of California Press, 1995.

Zielinski, Siegfried. Deep Time of the Media. Cambridge: MIT Press, 2006.

[cosmicgoods]

Curiosity: Wood/Brass/Glass Kaleidoscope/Prism/Dioptric Optic Lens Massachusetts

Used, in excellent condition

Comes in original box with original foam

Quality item made of Glass/Brass/Wood

2" L x 1.5" W

Van Cort Instruments of Massachusetts

Made in 1988

The 24 facets of this prism gives the viewer 24 upright images to view.  

This beautiful instrument was called Dragonfly for a reason. The Dragonfly which, in some species, has vision reaching nearly 360 degrees with 30 visual opsins (humans only have three!) can see depth and color in ways unimaginable to the human brain. Naming it this way evokes an important sense of imagination. The ability to imagine life from a new perspective is the backbone of artistic creation.

https://www.etsy.com/listing/1380134671

[bajaj-eye-care-centre]

Lasik Eye Surgery In Delhi

Lasik Eye Surgery In Delhi

Smile Laser Eye Surgery Relex SMILE

The most advanced third generation laser eye surgery for removal of glasses.

What is SMILE

SMILE stands for "Small Incision Lenticule Extraction" shuchi technologically is the most advanced technique developed in the past ten years. That is because it is -

1. Least invasive 2. One step 3. All laser 4. No blade 5. No flaps

The Procedure

SMILE is the latest advancement in laser vision correction. It is the THIRD GENERATION of refractive procedures. The first two are PRK, followed by LASIK. BAJAJ EYE CARE CENTRE is proud to be the first laser vision correction centre in North and East Delhi to offer the ZEISS VISUMAX femto second laser for SMILE vision correction. SMILE is an all laser, latest cutting edge technology for the correction of myopia and myopic astigmatism. It provides LASIK or even better outcomes in a lease invasive manner. SMILE uses only one type of laser that is femtosecond laser in single step procedure and hence is minimally invasive. During the SMILE procedure, the computer guided laser light energy cuts out a small corneal tissue called ‘Lenticule‘. This Lenticule is equivalent to the dioptric power of the refractive error of the patient. This Lenticule is removed through a small 2mm incision made by the femtosecond laser. This results in reshaping of the cornea and the vision gets corrected.

Precision of SMILE Procedure

The human cornea acts as a refractive surface, possessing al out two- thirds of the total refractive power of the eye. The light rays pass through the cornea, get refracted and then passing through the lens and internal structures of the eye, reach the retina to form an image. The refractive power of the cornea (and hence of the eye ) can be changed by reshaping the corneal curvature / shape of the cornea. This is done by reshaping the stroma ( middle layer ) of the cornea. The SMILE laser removes a thin layer of the stromal tissue ( in microns), created by it, called Lenticule, which is then removed through a small 2-3 mm incision by the experienced surgeon. The tissue removed creates an effect to reshape the corneal curvature equivalent to the spectacle number ( dioptric power ) of the glasses worn by the patient, making this procedure very precise. This all is done by the laser in a matter of seconds, in a painless manner.

Comfortable, Quick And Easy Procedure

The actual laser procedure to make the Lenticule hardly takes about 30-35 seconds. Patients do not experience any discomfort during the procedure and are able to see quickly without glasses within 24 hours of the surgery.

Benefits of SMILE

Minimally Invasive

SMILE is perhaps the least invasive technique possible in laser vision correction for the removal of glasses in comparison to PRK or LASIK Laser . In PRK , an 8-9 mm diameter epithelial layer of the cornea is removed mechanically and then the EXCIMER laser is used to reshape the cornea. In LASIK Laser, the procedure consists of two steps -

1. Making a flap - the flap is approximately 20 mm or more in circumference 2. Excite laser is used to reshape the cornea under the flap and the flap is settled back on the corneal surface. Whereas in SMILE, only a 2-3 mm keyhole is made in the cornea by the VISUMAX femtosecond laser, thereby reducing the damage/cutting of corneal nerves. This results in less dry eye and more stable corneas post operatively.

Flapless Technique

LASIK technique whether using blades ( microkeratome ) or bladeless ( femtolasik ), involves making a flap of the corneal tissue. Rarely complications can occur due to this flap called flap related complications either intra- operatively or post - operatively, though the chances are quite remote in good surgical hands. Since there is no flap created in SMILE procedure, there is no question of flap related complications, either during the procedure or after it.

Lesser Dry Eyes

Post - operative dry eyes is a relatively common side effect of LASIK / Contoura vision procedures . Because SMILE involves making of only. 2-3 mm laser incision versus 20mm incision in LASIK/ Contoura vision lasik procedures, there is potentially a minimal chance of dry eye post SMILE surgery.

Safety, Accuracy And Faster Visual Rehabilitation

Studies worldwide have found SMILE to be as safe and accurate as LASIK, besides the added advantage of quick visual recovery and faster rehabilitation, especially for people in contact sports, swimmers, police personnel etc. It only takes about a couple of days to experience amazing results.

SMILE Versus Lasik

SMILE - advantages of SMILE over LASIK SMILE is a flapless procedure. Since there is no flap created in SMILE, thus there are no flap related complications versus possible flap related complications in LASIK. There is better biomechanical stability of the cornea. Studies worldwide have shown SMILE to be a better biomechanically stable procedure versus LASIK, thus making it a much safer procedure compared to LASIK. As already mentioned, since SMILE involves making of only a 2- 3 mm laser incision, versus 20-24 mm circumferential incision in LASIK, lesser corneal nerves are cut/ severed, resulting in lesser dry eye symptoms versus LASIK.

Safety And Quality

BAJAJ EYE CARE CENTRE has always been deeply concerned and committed to the safety of its patients. BAJAJ EYE CARE CENTRE maintains the highest quality and safety standards applicable in the country, that is NABH standards. We at BAJAJ EYE CARE CENTRE, are proud to say that our centre is NABH accredited for the same.

To schedule an appointment with Dr. Rajiv Bajaj, please contact:

Name: Bajaj Eye Care Centre

Address: 101, Vikas Surya Plaza, Plot No. 7, DDA Community Centre Road No. 44, Pitampura, Delhi-110034Phone: 011-47024919 / 27012054 Website: www.bajajeyecarecentre.com You can also search for these treatments: Lasik treatment In Pitampura, Lasik treatment Cost In Pitampura, Lasik Eye Surgery In Pitampura, Eye Care Hospital In Pitampura, Eye Hospital In Pitampura, Eye Care Centre In Pitampura, Eye Specialist in Pitampura, Eye Doctor in Pitampura, Eye Clinic in Pitampura, Best eye Doctor in Pitampura, Cataract surgery in Pitampura, Cataract surgery cost in Pitampura, Cataract operation in Pitampura, Keratoconus treatment in Pitampura, Oculoplasty procedure in Pitampura, Ophthalmology clinic in Pitampura, Lasik treatment In Delhi, Lasik treatment Cost In Delhi, Lasik Eye Surgery In Delhi, Eye Care Hospital In Delhi, Eye Hospital In Delhi, Eye Care Centre In Delhi, Eye Specialist in Delhi, Eye Doctor in Delhi, Eye Clinic in Delhi, Best Eye Doctor in Delhi, Cataract surgery in Delhi, Cataract surgery cost in Delhi, Cataract operation in Delhi, Keratoconus treatment in Delhi, Oculoplasty procedure in Delhi, Ophthalmology clinic in Delhi,

[miss-biophys]

8. Always wear a lab coat

9. Always wear eye protection - protective glasses or dioptric are also fine

10. Before you take/use anything that it not yours, ask the owner for permission (so annoying if people do not do this!!!)

11. Do not wear open shoes like flip flops, or sandals

12. LABEL EVERYTHING

13. Do not plan any big experiment for Friday afternoon when you're just too tired (this one I learned the hard way)

Here is a list of rules I have learned working in a lab and being in lab classes over the years. Most of them I or someone around me learned the hard way.

LAB RULES

1. Change your gloves

2. Do not eat any samples. Even if they are food.

3. LABEL! EVERYTHING!

4. Do not leave any liquids precariously over the edge of a counter

5. The heat glove cannot touch things that are 550 Celsius

6. Add acid to water, never water to acid

7. Always have a spare pair of jeans