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November 1982

Mathematical Approaches to Refractive Examination-Reply

Author Affiliations

Newark, Ohio

Arch Ophthalmol. 1982;100(11):1855. doi:10.1001/archopht.1982.01030040834029

In Reply.  —We would like to compliment Dr Sims for also having used a mathematical approach to the refractive examination. As he points out, our approach to the refractive examination is regressive Phoroptor overrefraction. The program that we have written has been designed so that a refractionist wishing to do a Phoroptor overrefraction may also use the same program. In either event, the programmable calculator can be of assistance in determining a change of refraction.If a refractionist chooses to use the method of regressive overrefraction, he or she does not have to make a major change in his or her refractive technique. If the visual acuity is relatively good with the present spectacles, the refractionist may choose to start with the patient's present spectacle prescription in the refractor or trial frame.1 We recommend the use of regressive overrefraction only in those cases in which there is uncertainty as

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