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What does the sphere of my prescription say about my visual acuity? What is sphere?

2 doctors weighed in
Dr. Joseph Barakeh
Ophthalmology
1 doctor agrees

In brief: 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.

In brief: 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.
Dr. Joseph Barakeh
Dr. Joseph Barakeh
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