Dry eye is a major issue for people who stare at screens. You most likely aren't blinking enough, which causes your eyes to dry out. Quoting a previous comment of mine ( https://news.ycombinator.com/item?id=42796950#42797424 ) > A big thing not often spoken about with eye strain is dry eye caused by the lack of blinking due to focusing on screens too close to our face. This is an evolutionary phenomenon--close danger…
Ask HN: Do your eyes bug you even though your prescription is "correct"?
221–230 of 334 posts
Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?
#222The solution for me to eliminate headaches when working at computer screens was getting an extra set of intermediate distance glasses specifically for computer work. The "computer screen distance" of 3 ft is in between book-reading distance of 1 feet and driving distance 20'+ feet. I also avoid progressive lenses or high-index lenses for computer work. I commented about how arrived at this solution previously: https:…
> 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…
One problem I have (well, one of many these days, including some double vision, sigh) is that I'm very far sighted in one eye, and near sighted in the other, so one lens is barely anything, and the other is a coke bottle.
Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?
#223About 15 years ago or so I was part of a study for Zeiss wavefront lenses. They used some sort of interferometer to map my vision and generated a set of aspherical lenses based on that. They were absolutely the best pair of glasses I ever owned hands down. No chromatic aberration. Absolutely crystal clear vision. Granted, this was before presbyopia set in. As far as I could tell, they never really rolled out the syst…
Yes. Another huge problem is that, at least for me, my mind switches into "compeitive" mode and I start squinting, etc.
Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?
#224I was born with congenital bilateral cataracts and had the lenses in both eyes removed as an infant (a condition called Aphakia). I have been set up with monovision since I was very young -- that basically means I'm intentionally far-sighted in one eye and near-sighted in the other so that I use one eye for reading and the other eye for distance. I wear hard contact lenses most of the time, but I do have glasses. My…
The cold bottle glasses. You get those because they're cheaper these days. You can get the same prescription on a much thinner lens. I did that for my kid. He has a pretty strong prescription in one eye, but his lens is no thicker than mine. It adds a lot to the cost of the glasses, though. Easily $75 to just get half of the thickness.
someone else reminded me it's called index, and you can get like 1.74 index glasses that are wafer thin.
Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?
#225About 15 years ago or so I was part of a study for Zeiss wavefront lenses. They used some sort of interferometer to map my vision and generated a set of aspherical lenses based on that. They were absolutely the best pair of glasses I ever owned hands down. No chromatic aberration. Absolutely crystal clear vision. Granted, this was before presbyopia set in. As far as I could tell, they never really rolled out the syst…
Zeiss i.Scription seems to be their single-vision wavefront lens, https://www.zeiss.com/vision-care/us/eye-care-professionals/...
$10K MSRP for the optician's profiling equipment, https://navaophthalmic.com/product/i-profiler-plus/
Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?
#226I don't really know if anybody will read this, but if somebody does and knows what it is, please give me some advice.
I see double text, not anything else, only sources of light, like anything on a computer screen. It is like what I am seeing from both of my eyes does not line up correctly. On a completely white background, I see spotches of grey.
I have visited two or three doctors and each gave a different prescription, currently I have -1/1 approx, (I don't remember correctly). Man I am only 19, don't want to live like this T.T
Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?
#227Some people, including me, have what's commonly called ‘astigmatic halation’ — although it's often not due to simple astigmatism, but rather ‘higher order abberrations’‡ which aren't correctable by glasses. For this case, dark text on a light background is much better than light on dark. Dark on light, the light halation blends more or less evenly over the dark letter stems, resulting is slightly lower overall contra…
oh ive never heard of aberrations? it sounds like i might have it as i get weird shadows and stuff that i cannot put into exact words whenever i try to read black background white text! i will have to talk to my optician thank you
Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?
#228Earlier quoted context omitted.
Can’t find the message you’re replying to but I think you’re imagining the person sitting up. Imagine them lying down or propped up on their elbows with the book on the floor. Then that distance seems about right.
That's way too close for books or screens. Long term it can cause myopia.
I thought this had been debunked as the cause of myopia?
(Or am I totally misremembering something...)
Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?
#229My monitor (a Samsung ultrawide thing) has an option to reduce contrast (I think it’s called ‘eye saver mode’) that makes a massive difference. I don’t use for gaming but for work it’s made a massive difference to my comfort.
Re: Ask HN: Do your eyes bug you even though your prescription is "correct"?
#230Yes, I'm very nearsighted. I've worn progressive lenses for years but they continue to drive me crazy. I can see fine with them, but my eyes easily get fatigued and I have to take long breaks to get them to calm down. Over the summer I added a pair of progressive occupational lenses (not reading glasses). They are focused arms length in front of me. This has been a complete game changer. I can now see my monitor cris…
> With my regular lenses there's a part of the screen that's about a half dollar coin in size that's clear and in focus. The rest of the screen is every so slightly blurry.
I have two glasses that have lenses with a similar prescription. The older one has some basic lenses and anything outside the center gets gradually less clear towards the edges. The newer one has aspherical lenses and even the areas near the edges are quite clear. It wasn't expensive either. The best lens I have used was probably a zeiss one but I'm guessing the full featured zeiss is probably quite expensive.