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

340 points jbornhorst | 3 comments | 07 Mar 25 17:09 UTC | HN request time: 0.697s | source

I’m digging into an idea around eyeglasses, screen-time, and vision discomfort. If you wear prescription glasses but still get headaches, eye strain, or blurry vision after long screen days, I’d love to chat briefly (20–30 min).

Pure research, zero selling.

Interested? Drop a comment below or email me directly at jbornhorst [at] gmail.com. I’ll coordinate a convenient time to talk.

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rahimnathwani ◴[07 Mar 25 17:29 UTC] No.43292109[source]▶
If you're over 40 and have been wearing glasses for years, you might now need a pair with a weaker prescription just for computer use.
replies(4): >>43292205 #>>43292438 #>>43294140 #>>43294892 #
1. maayank ◴[07 Mar 25 21:25 UTC] No.43294892[source]▶
Not OP, but would like to try it. How much weaker? And should I weaken the cylinder strength as well?
replies(1): >>43295056 #
2. rahimnathwani ◴[07 Mar 25 21:42 UTC] No.43295056[source]▶
Don't trust random strangers on the internet!

You should ask a qualified or licensed optometrist or optician or whatever it's called wherever you live.

AIUI:

- you don't adjust CYL

- The amount you add is roughly 0.75, plus an extra 0.05 for each year above 40yo.

For example, at age 50:

Add = 0.75 + 0.05 × (50 − 40) = 0.75 + 0.5 = 1.25

So let's say that this person's regular glasses are -3.25 in each eye. Their computer glasses would be -2.00 in each eye.

Don't trust random strangers on the internet!

replies(1): >>43296674 #
3. bcrl ◴[08 Mar 25 01:29 UTC] No.43296674[source]▶
My optometrist set the adjustable lenses to what he thought was in the right ballpark and then had me read the chart at my requested distance for the computers lenses. A few adjustments, and done. They're perfect! Bonus: text is a bit bigger now, and I can read smaller fonts than I could before getting computer glasses.

The downside of this is that I now find it very difficult to read computer screens and my phone while wearing my distance lenses. The practice of holding things further away to be able to read them always was, I suppose, inevitable.