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A member asked:
What are the tests for refractive error?
5 doctors weighed in across 2 answers
Refraction: Refraction is the testing procedure which can determine refractive error. This is the process by which the glasses prescription is determined.
Answered 3/19/2014
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Sharpening vision: An auto-refractor machine finds the correction needed to make a clear image on the retina, and this is your "refractive error" that can be corrected with a prescription. People are now doing this with iphones for calculating sphere and cylinder.
Answered 6/12/2012
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