Question

What is the normal eyesight (diopter) for someone without glasses in the left and right eye?

Answer 1

Answer:

The optical power of a healthy human eye is about 40 diopters, meaning the ability to focus on an object or image 1/40 of a meter from the eye. The eye of a typical young person can adjust an additional 20 diopters. By age 25 this focusing flexibility is usually reduced to about 10 diopters.

Explanation:

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