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—Dr Morrison and I were aware of the article cited by Dr Waring, and, in addition, we reviewed the excellent and comprehensive report on normal and pathologic structure and function of the corneal endothelium that he presented to the American Academy of Ophthalmology in 1981.Accordingly, we did consider that the splitting of the posterior wound edges observed in three (not 15 as stated by Dr Waring) of our 23 postkeratoplasty specimens actually might have occurred between Descemet's membrane and an acellular posterior collagenous layer; however, judging by thickness, staining characteristics and tracing of Descemet's membrane through multiple sections of the same specimen, we were confident, even with light microscopy, that in these three specimens the splitting occurred between the thinner anterior and the thicker posterior layers of Descemet's membrane. We have identified various types, stages, and degrees of retrocorneal membrane formation in other specimens and are familiar
Swan KC. Penetrating Keratoplasty-Reply. Arch Ophthalmol. 1984;102(8):1121. doi:10.1001/archopht.1984.01040030903006
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