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July 18, 1908, Vol LI, No. 3 >
ARTICLE | July 18, 1908

ZONULAR OPACITY OF THE CORNEA.

F. C. HEATH, M.D.
JAMA. 1908;LI(3):220-222. doi:10.1001/jama.1908.25410030042001i.
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Zonular opacity of the cornea is described very briefly in the majority of text-books. Some do not mention it at all, a number dismiss it with a short paragraph, while a very few give it a page.

Nettleship contributed an article of about 25 pages on this subject to the Archives of Ophthalmology, in 1879, giving in detail 22 cases seen by various observers. Bock, Graefe, Usher, Best, Leber, and a few others have also investigated the subject quite extensively. The first description was given by Dixon in 1848, followed by Bowman, who went more deeply into the matter. Dixon called it calcareous film of the cornea, finding calcium carbonate and phosphate in the parts removed. Graefe named it band opacity, while Fuchs employs the term given at the heading of this paper. It has been more frequently designated as ribbon-like opacity, or keratitis, and calcareous keratitis.

Zonular opacity occurs

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