The 21 point vision analysis without a phoropter
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1Illinois College of Optometry.
Journal of the American Optometric Association
|October 1, 1975
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.