Optical problem: Refractive error means an abnormality of the optics of the eye that can be corrected with glasses and/or contact lenses.
Answered 12/31/2016
5.5k views
Image focus problem: Refractive error refers to nearsightedness, farsightedness, or astigmatism. If there is an imbalance between the to eyes, it is called anisometropia. These are all problems the eye has in focussing a clear image on to the retina.
Answered 3/14/2019
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