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I bought some cheap prescription[1] glasses ($20) just for computer use. They put optical infinity at around the distance to my monitor (~60 cm)[2], which keeps
by jml7c5 5y ago
I bought some cheap prescription[1] glasses ($20) just for computer use. They put optical infinity at around the distance to my monitor (~60 cm)[2], which keeps my ciliary muscles fully relaxed. It's completely fixed the soreness I'd feel in my eyes at the end of the day. I highly recommend it.
[1]: For those wondering, the calculation for required SPH is your_prescribed_SPH + (1/desired_distance). If you don't already wear glasses, then it's just (1/desired_distance).
- adamhooper 5y agoDesired distance in cm here I'm assuming?
- jml7c5 5y agoIn metres. (The unit for SPH on a prescription is the diopter; 1 dpt = 1 m^-1.) You can also just wander over to a pharmacy's glasses rack and hold some reading glasses in front of your normal ones to test how much SPH you need to add. (Optical power is approximately additive.) I should have noted: if you don't wear glasses already, or if that the formula gives you a SPH > 0.0 and you don't have astigmatism, then there's no need to order prescription ones. You can just go to the reading glasses rack in any store and buy ones with that SPH.