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September 1985

Posterior Collagenous Layer

Arch Ophthalmol. 1985;103(9):1278. doi:10.1001/archopht.1985.01050090030015

To the Editor.  —During their study of the effect of silicone oil on the corneas of rabbits and cats, Sternberg et al1 described the deposition of abnormal collagenous material on the posterior surface of the endothelium as well as between Descemet's membrane and the endothelium. They referred to these abnormal tissues as both a retrocorneal membrane and a posterior collagenous layer.In 1976, the late Michael Hogan, MD, pointed out in a personal communication to me that designating abnormal collagenous tissue between the corneal endothelium and Descemet's membrane as a "retrocorneal membrane" was imprecise, since endothelium lay on its posterior surface, making it "intracorneal." To emphasize this point and to more accurately describe this abnormal tissue that seems to be produced nonspecifically by a stressed or diseased corneal endothelium, I named this tissue the posterior collagenous layer of the cornea and divided it into three ultrastructural groups: banded, fibrillar,