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Easing Eye Strain with the Right Lenses (2012)

nytimes.com

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Re: Easing Eye Strain with the Right Lenses (2012)

#41

Post by DigitalJack »

superkuh wrote: post #39

At my -10 diopter in both eyes there's no winning with multi-monitor setups. It's a trade-off between chromatic abberation, internal reflection, and edge distortion. All the high refractive index lens materials I have tried have terrible abbe number and so their chromatic abberation is so bad I can't even LCD text out of the corner of my eye; or read a license plate on a car to the front left of me. I don't even both…

Wow, im really sorry to hear what you have to go through. Im sure you have thought of all kinds of scenarios to work around this, but I am curious about what conclusions you came to:

  Combining contacts and glasses?

  Surgery, even to just reduce the correction?

Re: Easing Eye Strain with the Right Lenses (2012)

#43

Post by ChuckMcM »

superkuh wrote: post #39

At my -10 diopter in both eyes there's no winning with multi-monitor setups. It's a trade-off between chromatic abberation, internal reflection, and edge distortion. All the high refractive index lens materials I have tried have terrible abbe number and so their chromatic abberation is so bad I can't even LCD text out of the corner of my eye; or read a license plate on a car to the front left of me. I don't even both…

I was testing point and shoot cameras the other day and one of the things that impressed me is just how quickly and smoothly they can auto-focus. I found myself looking around at the world through the viewfinder screen and it occurred to me that with 400+ ppi LCD displays why have we not yet created a 'visor' which is simply a reproduction of the scene outside but in constant focus for our eyes (I wear progressive lenses which, with a prism, have issues). Curve an iphone X screen to make a wrap around screen I think there is certainly something there.

Re: Easing Eye Strain with the Right Lenses (2012)

#44

Post by superkuh »

DigitalJack wrote: post #41
superkuh wrote: post #39

At my -10 diopter in both eyes there's no winning with multi-monitor setups. It's a trade-off between chromatic abberation, internal reflection, and edge distortion. All the high refractive index lens materials I have tried have terrible abbe number and so their chromatic abberation is so bad I can't even LCD text out of the corner of my eye; or read a license plate on a car to the front left of me. I don't even both…

Wow, im really sorry to hear what you have to go through. Im sure you have thought of all kinds of scenarios to work around this, but I am curious about what conclusions you came to: Combining contacts and glasses? Surgery, even to just reduce the correction?

I've tried contacts a few times but they're such an incredible hassle compared to glasses. And with my astigmatism the contacts have to be rotated correctly. When they get nudged off-axis (by blinking) the vision noticibly changes.

I did go in for an assessment for laser eye surgery. Unfortunately there's just not enough cornea for them to fully fix my eyes. Since I do optical astronomy I didn't want to risk night vision rays just so I could wear a slightly smaller pair of glasses.

Re: Easing Eye Strain with the Right Lenses (2012)

#45

Post by Freestyler_3 »

jdavis703 wrote: post #3

I have tried programming with contacts in (usually when my glasses were damaged beyond repair or lost). I can barely work for 6 hours before the contacts dry out, even when using contact lens drops. Does anyone know of tips for finding contacts that are good for computer use?

I sort of had this problem, my tear ducts work for 20% so I have prescription eye drops. That sort of forces me to wet my eyes. The month lenses are not that good for me, the dirt build up is big, and they don't even last a month most of the time. Best for me is day lenses.

What I did to test out many lenses, is get a real good optician to measure my eyes. Ordered a set of lenses with them, then used the labels to order different brands online. It was more expensive to measure my eyes there than at some random optician store who do it for free, but it was so much better.

Re: Easing Eye Strain with the Right Lenses (2012)

#46

Post by walterbell »

superkuh wrote: post #39

At my -10 diopter in both eyes there's no winning with multi-monitor setups. It's a trade-off between chromatic abberation, internal reflection, and edge distortion. All the high refractive index lens materials I have tried have terrible abbe number and so their chromatic abberation is so bad I can't even LCD text out of the corner of my eye; or read a license plate on a car to the front left of me. I don't even both…

Have you looked at double aspheric freeform single vision lenses like Sieko Super MV or Hoya Nulux EP?

https://www.2020mag.com/ce/double-asphericity-a-free-form-D5...

http://www.robertsonoptical.com/wp/wp-content/uploads/2016/0...

Re: Easing Eye Strain with the Right Lenses (2012)

#47

Post by jaggederest »

ScottBurson wrote: post #37
walterbell wrote: post #32

Earlier quoted context omitted.

Freeform single vision lenses are marketed as having a larger optical center and less distortion for strong prescriptions, but they are expensive, https://www.2020mag.com/article/premium-free-form-single-vis... Are the CR-39 lenses noticeably thicker? Edit: first I’ve heard of wide gamut RGB LED monitors, https://pcmonitors.info/articles/the-evolution-of-led-backli...

The maximum thickness is about 4mm -- very reasonable, given the strength of the correction. This is with a fairly small round frame (lens width 41mm). The first RGB LED monitor I ran into was an Apple Cinema Display, several years ago. I initially didn't understand why I found it so uncomfortable to use. I think all the iMacs built in the last 7 years or so are RGB, as are all the Retina MacBook Pros. -- Well, as th…

Freeform lenses, from what I can see, are an attempt to compensate for higher-order aberration than the standard sphere, cylinder/axis, prism/base prescription

Re: Easing Eye Strain with the Right Lenses (2012)

#48

Post by bluedino »

superkuh wrote: post #39

At my -10 diopter in both eyes there's no winning with multi-monitor setups. It's a trade-off between chromatic abberation, internal reflection, and edge distortion. All the high refractive index lens materials I have tried have terrible abbe number and so their chromatic abberation is so bad I can't even LCD text out of the corner of my eye; or read a license plate on a car to the front left of me. I don't even both…

>> At my -10 diopter in both eyes

I was -9.50 in both eyes and in the same boat as you. I started to get astigmatism which made contacts very expensive (toric lenses).

I went to get LASIK and even though it got me to just 20/30, it was a huge improvement. A few years later I got PRK to fix one of my eyes and I've been fine since, but in another 10 years I'll have to get a light prescription as you can't fight the aging process.

Re: Easing Eye Strain with the Right Lenses (2012)

#50

Post by johnt15 »

csomar wrote: post #25
lobster_johnson wrote: post #21

Earlier quoted context omitted.

This is overly sensationalistic and seems to be based on a single bad personal experience. Most people can wear contacts just fine with zero side effects. I've been wearing contacts for more than 20 years. I started with yearly lenses, then monthlies, then dailies, then multi-focal dailies. They've all been superb, and I've never had any issues with dryness. I use contacts from morning to night, only switching to gla…

> overly sensationalistic Maybe, but you can check the Internet about eye dryness. I think there is a lack of stats in this area. The problem is that people react differently. And for some people the damage from dryness is quasi-permanent. So unless there are very established measures/stats, I'd not take risks.

Some anecdotal data:

Due to some reasons I couldn't use contact lenses in one eye for a couple of months. I switched to using contacts in single eye for that period, as I can't stand glasses for more than one hour due to very high myopia. It turns out, single contact has enough benefits that I didn't switch back to wearing two contact lenses after the issues with the eye went away. Instead I use single contact lens alternating between eyes for the last four years. Some observations:

- The issues with contact lenses became almost nonexistent. I almost never feel dryness in the eyes.

- Perhaps surprisingly, whenever I feel dryness in the eyes, it's always the eye without contact lens.

- It seems that the eyes have much much higher stamina now. They never feel tired regardless of how much I abuse them. I could look into screen all day without breaks and I wouldn't feel any issues as far as eyes are concerned.

- Since I have high myopia, using single contact gives my vision very high dynamic range. The eye without a contact is almost like a microscope.

- The potential wear of the cornea is reduced twice.

I can also attest that the brand of the contacts matters a lot. I remember several brands of contacts being really uncomfortable to use. Currently I wear 'Biofinity XR' if anyone cares. There were several other brands that I liked, but I don't remember them.

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