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Pellucid marginal degeneration with superior corneal thinning

K S Bower1, D K Dhaliwal, D A Barnhorst

  • 1Department of Ophthalmology, University of Pittsburgh Medical Center, Pennsylvania 15213, USA.

Cornea
|July 1, 1997
PubMed
Summary
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Pellucid marginal degeneration, a corneal thinning disorder, can occur in the superior cornea, not just the inferior. This case highlights superior corneal thinning with ectasia, expanding the differential diagnosis for such conditions.

Area of Science:

  • Ophthalmology
  • Corneal Diseases
  • Ocular Surface Disorders

Background:

  • Pellucid marginal degeneration (PMD) is characterized by noninflammatory inferior corneal thinning and ectasia.
  • Diagnosis typically relies on characteristic inferior corneal findings.

Observation:

  • An 80-year-old male presented with high astigmatism.
  • Examination revealed superior corneal thinning and ectasia in the right eye.
  • Inferior corneal thinning, typical of PMD, was also present bilaterally.

Findings:

  • The patient exhibited both superior and inferior corneal abnormalities.
  • The superior thinning presented as a prominent band with ectasia.
  • The inferior thinning showed characteristic zones without inflammation.

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Implications:

  • Superior pellucid marginal corneal degeneration is a potential diagnosis for superior ectatic disorders.
  • This finding broadens the understanding of PMD presentation.
  • Ophthalmologists should consider superior corneal thinning in the differential diagnosis of ectatic conditions.