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A member asked:

How do you calculate an intermediate prescription for eye glasses?

A doctor has provided 1 answer
Dr. Tim Conrad answered

Specializes in Ophthalmology

Easy: Take the distance sphere power and add 1.00 to it and then take the near add power and reduce it by 1.00. This is my typical calculation for computer glasses. For example, your right lens is -2.25 +1.25 x 30 add: +2.00, your computer glasses would be -1.25 +1.25 x 30 add: +1.00. Hope this helps.

Dr Jacobson agreed

Answered 9/8/2016

4.8k views

Thank

Related Questions

A member asked:

Hi, wearing incorrect prescription glasses, will not harm eyes regardless if someone is nearsighted and continue wearing for next 1 year, correct?

2 doctors weighed in across 2 answers

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I've been having constant dry eye, i wear prescription glasses and have headaches pretty much everyday. Could they be linked? I'm not sure why I have dry eye.

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A member asked:

I see slightly more blurry with my left eye, but whenever I put on my glasses, the effect reverses and the right eye sees worse. My prescription is the same in both eyes. Is my prescription wrong, and do I need different ones in each eye instead?

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A member asked:

Ive noticed that driving at night is near impossible for me. Every oncoming car with the headlights on affects me and distorts my eyes for a sec. I have prescription glasses and a sun tint, cause of photophobia. Is there any tint or shade to help?

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Can prescription glasses hurt your eyes?

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