Refraction: A cycloplegic refraction may disclose some hidden hyperopia that is one cause of prescriptions not working well. Furthermore, proper fitting, pupil centration, pantiscopic tilt, and base curve maintenance is helpful. Undiagnosed microtropias & astigmatism axis changes are other fatiguing or blurring symptoms discovered on examination. And of course something could be wrong with the lens grinding.
Answered 7/21/2014
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