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Article
June 1955

Visibility of the King of Schwalbe and the Trabecular ZoneAn Interpretation of the Posterior Corneal Embryotoxon and the So-Called Congenital Hyaline Membranes on the Posterior Corneal Surface

Author Affiliations

Iowa City
From the Department of Ophthalmology, State University of Iowa College of Medicine.

AMA Arch Ophthalmol. 1955;53(6):767-782. doi:10.1001/archopht.1955.00930010775001
Abstract

About two years ago our attention was drawn to glassy ring-like structures at the periphery of the posterior surface of the cornea. It soon became evident that these bands corresponded to the so-called posterior embryotoxon of the cornea (Embryotoxon corneae posterius, Axenfeld1), posterior marginal dysplasia of the cornea (Streiff2), congenital hyaline membranes on the posterior surface of the cornea (Mann3), or peripheral refractile postcorneal rim (Graves4). Once our interest in this subject was awakened, we devoted a close study to the limbus of all patients whom we saw and performed a slit-lamp gonioscopic examination on those who presented to external slitlamp study an unusual appearance of the limbus or of the periphery of the cornea.

These clinical investigations were followed by a careful study of 600 pathologic specimens of eyes, and this study, in turn, prompted us to extend our investigations to the chamber angle of

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