The 21 point vision analysis without a phoropter.

E L Kasperek; C Hatfield

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PubMed · 1078338

The 21 point vision analysis without a phoropter.

E L Kasperek·C Hatfield

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Abstract

This paper offers a sequence of valid tests, objective in nature, to measure the vision performance and provide an appropriate prescription for an individual who is unable to undergo the demands of a 21 point analytical refraction, through a phoropter, due to age, intelligence or communication difficulty.

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E L Kasperek, C Hatfield. 1975. The 21 point vision analysis without a phoropter.. https://pubmed.ncbi.nlm.nih.gov/1078338/

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