Pellucid Marginal Degeneration (PMD) is a noninflammatory, nonhereditary cause of corneal ectasia with bilateral, clear, inferior (typically 4 o’clock to 8 o’clock), peripheral corneal thinning.

2019年8月1日 · Clinicians need to dig a little deeper when they see a topography map that shows a “crab claw” pattern. The term pellucid marginal corneal degeneration (PMD) is widely used in the ophthalmic profession to describe a characteristic topographic appearance.

2002年11月18日 · Pellucid marginal corneal degeneration (PMCD) is a progressive noninflammatory ectatic corneal disorder involving the inferior cornea in a crescentic fashion. 1 This clinical condition is distinguished from other ectatic corneal disorders by its characteristic location and the absence of inflammatory signs.

Pellucid marginal degeneration is an uncommon, non ulcerative, thinning disorder of the inferior peripheral cornea and was first well characterized in an article by Krachmer, in 1978.1 The term was originally coined by Schlaeppi/ in 1957, to describe a marked steepening of the inferior cornea superior to a narrow, clear band of corneal thinning ...

Pellucid marginal degeneration is diagnosed by corneal topography. Corneal pachymetry may be useful in confirming the diagnosis. Treatment usually consists of vision correction with eyeglasses or contact lenses. Intacs implants, corneal collagen cross-linking, and corneal transplant surgery are additional options.

Pellucid marginal corneal degeneration (PMCD) is a pro-gressive noninflammatory ectatic corneal disorder involving the inferior cornea in a crescentic fashion.1 This clinical condition is distinguished from other ectatic corneal disor-ders by its characteristic location and the absence of inflam-matory signs. The thinning usually extends from the

2023年8月28日 · Pellucid marginal corneal degeneration (PMCD) is a bilateral, noninflammatory, peripheral corneal thinning disease. It is characterized by a peripheral crescentic band of thinning, usually in the inferior cornea. The ectatic zone, which is 1-2 mm from the limbus, lies above the point of the maximum corneal thinning.

2024年3月7日 · Pellucid marginal degeneration (PMD) of cornea is a relatively rare type of corneal ectasia. Typical cases of PMD, when imaged by a Placido-based corneal topographer, are characterized by a...

2017年9月22日 · To evaluate the topographic, tomographic, and densitometric properties of patients with pellucid marginal degeneration (PMD) and inferior keratoconus. Retrospective, comparative case series....

2011年4月1日 · Pellucid marginal corneal degeneration (PMD) is a rare ectatic disorder which typically affects the inferior peripheral cornea in a crescentic fashion. The condition is most commonly found in males and usually appears between the …