CLINICAL USE OF OPHTHALMIC PRISMS (METRIC)

1 July 1945

journal article
research article
Published by American Medical Association (AMA) in Archives of Ophthalmology (1950)

Vol. 34 (1) , 16-23
https://doi.org/10.1001/archopht.1945.00890190016003

Abstract

In a previous report¹ the origins and developments of the present systems of numbering ophthalmic prisms were discussed, and attention was called to three important facts: Both the Dennett² system of utilizing the prism centrad (▽) as a unit and the Prentice system³ of utilizing the prism diopter (△) as a unit require that all refractive effect must take place at one surface. This condition is violated more frequently than it is observed in clinical practice. I have watched many ophthalmologists, teachers as well as students, in making their measurements of squint, and the

Keywords

OPHTHALMIC PRISMS
SUP
SQUINT
REFRACTIVE
DIOPTER
OPHTHALMOLOGISTS
WATCHED
PRENTICE

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