Diffuse drusen and associated complications.

An eye of a patient with an unusual form of diffuse drusen was studied by light and electron microscopy. Examination disclosed marked diffuse and nodular thickening of the inner portion of Bruch's membrane by vesicular and curvilinear membranous profiles and basement membrane-like material that was apparently derived from the retinal pigment epithelium. Deposition of this abnormal material suggests a diffuse abnormality of the retinal pigment epithelium and predisposes to serous detachment of the retinal pigment epithelium, choroidal neovascularization, hemorrhagic detachment of the retinal pigment epithelium, and disciform scarring. The features of this case are similar to previously reported cases of diffuse drusen, but differ in the early age of onset, intensity of changes, and, in part, by the nature of the abnormal material observed.

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