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Pellucid marginal corneal degeneration.

Archives of Ophthalmology (Chicago, Ill. : 1960)

|July 1, 1978

Summary

This summary is machine-generated.

Pellucid marginal degeneration is a rare, bilateral corneal thinning disorder. It is often misdiagnosed and requires differentiation from other noninflammatory and inflammatory peripheral corneal conditions.

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Area of Science:

Ophthalmology
Corneal Diseases

Background:

Pellucid marginal degeneration (PMD) is a bilateral, clear, inferior, peripheral corneal-thinning disorder.
It is characterized by corneal protrusion above a band of thinning, typically 1-2 mm from the limbus and 1-2 mm in width.
PMD is less familiar to American ophthalmologists due to predominantly European literature.

Observation:

The abstract describes four cases of pellucid marginal degeneration.
The condition presents as a clear, inferior peripheral corneal thinning.
Corneal protrusion is observed above the thinned area.

Findings:

Pellucid marginal degeneration is differentiated from noninflammatory corneal thinning disorders including keratoconus, keratoglobus, keratotorus, and posterior keratoconus.
It is also distinguished from inflammatory peripheral corneal disorders such as Terrien's peripheral corneal degeneration, Mooren's ulcers, and ulcers associated with connective tissue disease.

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Implications:

Increased awareness of PMD among ophthalmologists is needed.
Accurate differentiation from other corneal conditions is crucial for appropriate patient management.
Further research and case studies can improve understanding and diagnosis of this rare disorder.