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![]() ![]() Keratectasia in 2 cases with pellucid marginal corneal degeneration after laser in situ keratomileusis. Japan J Ophthalmol 2003 47:523–525.įogla R, Rao SK, Padmanabhan P. Progression of pellucid marginal degeneration and higher-order wavefront aberration of the cornea. Kamiya K, Hirohara Y, Mihashi T, Hiraoka T, Kaji Y, Oshika T. The results of penetrating keratoplasty for pellucid marginal corneal degeneration. Keratoconus with pellucid marginal corneal degeneration. Kayazawa F, Nishimura K, Kodama Y, et al. Corneal topography of pellucid marginal degeneration. Maguire LJ, Klyce SD, McDonald MB, Kaufman HE. Sridhar MS, Mahesh S, Bansal AK, Nutheti R, Rao GN. Corneal topography in atypical pellucid marginal degeneration. ![]() Superior pellucid marginal corneal degeneration with hydrops. This process is experimental and the keywords may be updated as the learning algorithm improves. These keywords were added by machine and not by the authors. Usually, present with reduced visual acuity owing to high irregular astigmatism in the fourth to fifth decades of life ( 4). The area between the limbus and thinning is clear, without scarring, lipid deposition, or vascularization. Typically the thinning extends from the 4-o’clock position to the 8-o’clock position, 1 mm from the limbus with intact epithelium and normal corneal thickness superiorly. The degeneration is distinguished from other ectatic corneal disorders by its characteristic location and the absence of inflammatory signs. Although classically described as an inferor entity, the site of involvement can be in any quadrant of the cornea, including the superior part, which is termed superior PMCD ( 2, 3). It is a bilateral disease, although one eye may be affected earlier and clinically diagnosed, while the other eye has no clinical features ( 1). Pellucid marginal corneal degeneration (PMCD) is a noninflammatory ectatic corneal disorder mostly involving the inferior half of the cornea in a crescentic fashion (Fig. ![]()
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