U.S. doctors online nowAsk doctors free
India
A 47-year-old male asked:

How to calculate the intermediate power for computer glasses from the near vision prescription?

2 doctor answers2 doctors weighed in
Dr. Faramarz Hidaji
Cosmetic Surgery 31 years experience
Subtract 1.00: The intermediate strength is the reading prescription minus 1 diopter typically. However, your eye doctor can adjust this strength based on the actual distance your computer sits from you.
Created for people with ongoing healthcare needs but benefits everyone.
Dr. Richard Bensinger
Ophthalmology 54 years experience
Usually one-half: Not too difficult. Take one-half of the add power (the near power) and add it to the basic power (e.g. -4.00 for basic and +1.25 for add equals -2.75 for the computer power). Slightly more complex if you have significant astigmatism, the final power in the above case for computer bifocals would be upper power = -2.75 and near power +1.25).
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Jun 6, 2022

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.