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Ask HN: Do your eyes bug you even though your prescription is "correct"?

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Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?

#191

Post by notfed »

walterbell wrote: post #116
simoncion wrote: post #108

Earlier quoted context omitted.

How the hell did you convince your optometrist to correct your vision to 20/7? The past two docs I've been two have ignored me when I've said "I can make out the letters, but they're blurry and fuzzy. Can we go stronger?" with "Well, that's corrected to 20/20 vision.". I'm very, very strongly considering finding a used eye-testing-headgear thingie like they have in their offices, learning how to use it, and doing the…

Search "trial lens set" and "trial lens frame", the portable versions which were used for decades in the past.

Wow...thank you for this phrase. I always thought it was impossible to find prescription lenses online, and there's a box with literally all of them...

Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?

#192

Post by notfed »

peterldowns wrote: post #9

Yes, but the solution is simple — get up and look at something further away than my screen. I rely on my eyes bothering me to tell me that I need to get up and move.

This is called the 20/20/20 rule: every 20 minutes, look at someone 20ft away (or just close your eyes) for 20 seconds.

I wouldn't call it "the" solution: it's part of a complete breakfast.

Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?

#193

Post by walterbell »

globnomulous wrote: post #179
kps wrote: post #101

Earlier quoted context omitted.

> I also avoid […] high-index lenses for computer work. Yes! You're the first to mention this. It's not refractive index itself that's the problem, it's dispersion (roughly, the degree to which refractive index varies across the visual spectrum, described by ‘Abbe number’). We've all seen pictures of a prism splitting a beam of white light into a rainbow — for visual purposes, the less split the better. Higher-index…

Hear, hear! Here's a good way to test your glass's refraction index. On your desktop find a small red icon with something white in the center. Stare directly at it. Now turn your head until the icon is at the edge of your vision. If your lenses are cheap polycarbonate, the white part of the icon will appear to move towards the edge of the icon or even out of it. Most non-cheapo glasses today in the US use Trivex. It'…

Among non-glass options, CR-39 is a good choice for computer glasses with prescriptions weaker than -5:

  - high (58) Abbe number
  - thick (1.5 index)
  - cheapest
Thickness and weight can be mitigated with a smaller frame, e.g. vintage options.

Actually buying CR-39 lens might require solving a dark pattern maze of online or offline options, since the cost is so low.

Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?

#194

Post by notfed »

instagib wrote: post #146

I used an app iOS “eye movement training” for free post concussion. The slide rule looking eye training is also kind of rough. A string with two or three beads on it. All fun things that could make me puke from doing too much.

This is part of what's referred to as "vision therapy". Optometrists would tell you to go to a paid expert---because purportedly some people do it wrong---but IMO you can just YouTube it.

Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?

#195

Post by notfed »

dakiol wrote: post #34

Slightly related: does anyone do eye “exercises”? As in, for 5 minutes, move the eyes all around in a 360 degrees fashion, alternating with left to right (and right to left) movements. I use the computer many hours per day and that means my eyes are usually fixed at a 27 inch monitor for hours. I think the exercises are “strengthening” my eyes muscles… not sure if true though.

The term to Google for this is "vision therapy": there are several tried and true exercises.

Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?

#196

Post by BugsJustFindMe »

ben_sisko wrote: post #140

Before I got my first pair of progressives lenses I saw a lot of conflicting anecdotal accounts. After doing research, the conclusion I came to was simple: I got the very best progressive lens that Lens Crafters sells because the best lens has a much larger intermediate “corridor” size than less expensive progressive lenses. I have had zero issues with my progressive lenses. I forget I even “have” progressive lenses…

> If I was forced to guess, I would say that some (or maybe even all) of these folks who start talking about the computer glasses

Not all, because I'm one of them and I think progressive lenses are dumb and won't buy them, but I will buy top of the line distance correction and get it checked to make sure it's correct and then get top of the line computer glasses and make sure that they're correct too. I will get transition lenses though. Those are pretty great (except in a car I guess).

I don't need glasses that sacrifice fov for distance and also for my computer when I can just keep the right glasses with my computer.

Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?

#197

Post by femto »

Get checked for keratosis? Prescription lenses make certain assumption about the shape of your eye. Keratosis means your eye is a slightly wonky shape and doesn't fit the "spherical with cylindrical astigmatism" model, so a lens won't correct your vision properly.

Does the problem persist with contact lenses? Soft contact lenses can do a better job of correcting vision for someone with keratosis, as they conform to the wonky surface of the cornea.

Edit: Just realised you're probably doing market research rather than asking for yourself. Either way, people with keratosis, who don't fit into the box, might be something to consider.

Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?

#198

Post by walterbell »

notfed wrote: post #191
walterbell wrote: post #116

Earlier quoted context omitted.

Search "trial lens set" and "trial lens frame", the portable versions which were used for decades in the past.

Wow...thank you for this phrase. I always thought it was impossible to find prescription lenses online, and there's a box with literally all of them...

As recommended elsewhere in this thread, EyeBuyDirect is quite good if you have enough knowledge to specify your own glasses and fitting. They are owned by upstream BigLens™, so lens quality is comparable to many opticians, with low pricing since they make their margin on frames. If you need custom fitting height for one of their frames, you can measure and return after receiving the glasses, then they will remake a new pair for free within 14 days of receiving the first pair.

Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?

#199

Post by YZF »

simoncion wrote: post #108
avalys wrote: post #38

Anecdotally related, but, during Covid and remote work I went to an optometrist around age 35 after I noticed my distance vision was blurry, especially at night after working inside all day. They told me "you have 20/20 vision, your vision is completely fine, you don't need glasses!" But, I responded, my vision is definitely blurry. They politely told me to stop wasting their time. Dissatisfied, I went to another opt…

How the hell did you convince your optometrist to correct your vision to 20/7? The past two docs I've been two have ignored me when I've said "I can make out the letters, but they're blurry and fuzzy. Can we go stronger?" with "Well, that's corrected to 20/20 vision.". I'm very, very strongly considering finding a used eye-testing-headgear thingie like they have in their offices, learning how to use it, and doing the…

That's odd. Most optometrists I've seen over my life (and specifically here in Canada, BC) will keep trying to adjust and ask you if it's sharper or not before they settle on the numbers. They'll go higher or lower power and/or astigmatism in different increments. They're also generally pretty cool with things like testing with a laptop monitor and getting the sharpest computer prescription.

Maybe this is your sweet spot?

Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?

#200

Post by YZF »

sieve wrote: post #143

I have had very high myopia (-9D) for most of my life. Used contacts for nearly a decade starting 30 years ago. Went back to glasses after that. Would have eye strain issues due to 12+ hours on the computer every day. When I turned 40 and started have issues with presbyopia, I asked my opthalmologist (who also writes my eyeglass prescription) during my biennial checkup why he has been prescribing powers based on how…

yep. 1d is a rule of thumb. My optometrist is cool with me bringing my laptop and measuring at the distance I feel is best for me.
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