why do sunglasses not have power?

Asked by ESHA ESHA | 29th Aug, 2012, 09:37: PM

Expert Answer:

Sunglasses don't have power because they don't, ideally, change the image seen by the eye.
For people with normal eyesight the sunglasses shouldn't have any optical effect, other than to reduce the glare.

Answered by  | 30th Aug, 2012, 10:01: AM

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