Pellucid marginal degeneration

Pellucid Marginal Degeneration (PMD) is a rare form of corneal degeneration that is characterized by a thinning of the peripheral cornea. The condition typically presents in the second to fifth decade of life and is often bilateral. The cause of PMD is unknown, but it is not associated with any systemic diseases.

Symptoms

The primary symptom of PMD is a gradual decrease in visual acuity, which can be accompanied by astigmatism. In some cases, patients may also experience photophobia, or light sensitivity.

Diagnosis

Diagnosis of PMD is typically made through a comprehensive eye examination, which may include corneal topography to map the surface of the cornea and identify the characteristic thinning and steepening of the cornea associated with PMD.

Treatment

Treatment options for PMD depend on the severity of the condition. In early stages, corrective lenses or contact lenses may be used to improve visual acuity. In more advanced cases, surgical intervention may be necessary. This can include procedures such as corneal transplantation, lamellar keratoplasty, or corneal collagen cross-linking.

See also

• Corneal degeneration
• Keratoconus
• Corneal topography

References

Pellucid marginal degeneration Resources
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