Corneal topography of pellucid marginal degeneration.
Our computer-based corneal topography analysis system was used to study the keratoscope photographs (keratograms) from two patients with classic pellucid marginal degeneration and a third patient with no inferior corneal thinning, whose keratoscope mire pattern was suggestive of the condition. All three patients showed marked flattening of the central cornea along a vertical axis and marked steepening of the inferior corneal periphery, which also extended into mid-peripheral inferior oblique corneal meridians. The mid-peripheral cornea gradually decreased in power above the inferior oblique meridians.
D001251:Astigmatism / Q000209:etiology* / Q000473:pathology; D003196:Computer Graphics; D003315:Cornea / Q000473:pathology*; D003316:Corneal Diseases / Q000150:complications / Q000473:pathology; D003937:Diagnosis, Differential; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged