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Otto Barkan, M.D.

Arch Ophthal. 1940;24(4):798.

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

Owing to an increase in popularity of gonioscopy, a demand has been created for a less expensive diagnostic contact glass. Following Dr. Jonas S. Friedenwald's suggestion, Gradle¹ constructed a diagnostic contact lens made of lucite² which he demonstrated at the meeting of the American Ophthalmological Society in San Francisco in June 1938. I had at that time constructed a molded contact glass of lucite³ which has characteristics and optical principles similar to those of the Koeppe glass and different from those of the Gradle lens. The stemlike feature of the latter was incorporated as a detachable handle in order to add to its convenience.

The present lens, shown in the accompanying illustration, is used in the examination of the anterior chamber angle in the same manner as the regular Koeppe lens. This lens has an inherent magnification of X 1. This means that 50 per cent more . . . [Full Text PDF of this Article]

Author Affiliations
San Francisco

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