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A member asked:
What does the sphere of my prescription say about my visual acuity? what is sphere?
A doctor has provided 1 answer
Near or far sighted: Sphere is the degree of near (minus power) or far (plus power) sightedness. For example, -3.00 sphere is 3 diopters of nearsightedness. -4.00 would be even more nearsightedness. Put a + in front of those numbers instead, and that would be farsightedness. Sphere does not include any astigmatism, a.K.A. Cylinder.
Answered 7/4/2014
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