A 39-year-old member asked:
what is the distance to measure nearsightedness at, and why?
1 doctor answer
Dr. Richard Bensinger answered
52 years experience Ophthalmology
20 feet: All lanes are corrected for distance to be equivalent to 20 feet which is the defined standard. In metric countries it is 6 meters. The snellen fraction 20/ over something, uses the 20 foot standard as part of the fraction. It is arbitrary but since a universal standard was needed for the optical industry, in the usa 20 feet is adopted for all to measure by.
Answered on Apr 25, 2013
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A 31-year-old member asked:
Dr. Douglas Fronzaglia ii, do, ms answered
21 years experience Geriatrics
No: Near and far-sightedness is due to the shape of your eye. You can perform eye exercises to help strengthen your focusing ability.
A 43-year-old member asked:
Dr. Richard Bensinger answered
52 years experience Ophthalmology
Yes: Nearsighted eyeglass (or contact) correction will be denoted on the prescription as a (-) power and a number (e.g. -2.75) which would be a nearsighte ... Read More
A 62-year-old male asked:
Dr. Richard Carlin answered
50 years experience Ophthalmology
Either or both: It can interfere with either or both.
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1 thank
A 31-year-old member asked:
Dr. Tim Conrad answered
34 years experience Ophthalmology
No: Glasses do not change eyes in any way.
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