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R. TULLY BRADFORD, M.D.; LAWRENCE J. LAWSON, Jr., M.D.

AMA Arch Ophthalmol. 1954;51(5):695-700.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

IN THE PAST there have been numerous attempts to design a refractometer which would simplify the objective determination of the ocular refraction. Previously designed metering devices have offered speed of examination, but they have not attained the accuracy of good retinoscopy. The most recent machine is the Rodenstock refractometer (Fig. 1), which is founded on the principles set forth by Schmidt-Rimpler in 1877. An illuminated test plate is placed at the principal focus of a convex lens placed before the eye, so that parallel rays enter the eye and in emmetropia come to a sharp focus on the retina. From this sharp retinal image, parallel rays emerge from the emmetropic eye and are focused by the convex lens in the manner of indirect ophthalmoscopy at the position of the test plate. In myopia the test plate must be moved closer to the convex lens to obtain a clear retinal image, . . . [Full Text PDF of this Article]

Author Affiliations
CINCINNATI; CHICAGO

From the Department of Ophthalmology, Illinois Eye and Ear Infirmary of the University of Illinois College of Medicine.

Footnotes
Presented before the Chicago Ophthalmological Society, May 18, 1953.

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