# 4 doctors weighed in: What is the highest and the lowest diopter on a corrective lens? 4 doctors weighed in

Dr. Matheson Harris
Ophthalmology
1 doctor agrees
In brief: Sky's the limit
Theoretically, you could have a very high or low number, but this is limited by the materials they are made of and what you could reasonably put on someone's face.
I've seen glasses as strong as +15.00 and -35.00 in my own experience.

In brief: Sky's the limit
Theoretically, you could have a very high or low number, but this is limited by the materials they are made of and what you could reasonably put on someone's face.
I've seen glasses as strong as +15.00 and -35.00 in my own experience.
Dr. Matheson Harris
Dr. Matheson Harris
Dr. William Goldstein
Ophthalmology
In brief: .25 to infinity
The smallest amount of correction we measure and put in glasses or contacts is in .
25 diopter increments. The highest power that I have seen is -25.0! this person can see about 1/16th of an inch in front of themselves!

In brief: .25 to infinity
The smallest amount of correction we measure and put in glasses or contacts is in .
25 diopter increments. The highest power that I have seen is -25.0! this person can see about 1/16th of an inch in front of themselves!
Dr. William Goldstein
Dr. William Goldstein
Dr. David Kira
Ophthalmology
In brief: +6 to -20
There theoretically is no limit but practical limits are about +6 to -20.
Beyond these ranges, contact lenses, implantable lenses or elective cataract extractions are realistic alternatives (refractive lens exchange).

In brief: +6 to -20
There theoretically is no limit but practical limits are about +6 to -20.
Beyond these ranges, contact lenses, implantable lenses or elective cataract extractions are realistic alternatives (refractive lens exchange).
Dr. David Kira
Dr. David Kira