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.

Answered 9/8/2016

4.8k views

Thank

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