However, in the left eye a clear band of peripheral thinning about 1-2 mm wide, was noted inferiorly extending from the 4.30 to 8.30 o' clock meridian, with anterior protrusion of the cornea just above the thinned area. Slitlamp examination of the right cornea revealed normal features without any thinning or protrusion. Keratometric measurements in the right eye were 42.50 95ø and 43.50 5ø, and in the left eye, 39.50 95ø and 48.50 180ø. On examination, his best corrected visual acuity in the right eye was 6/6 (-0.50 Dsph with -0.75 Dcyl 95ø) and in the left eye, 6/36 (-7.50 Dcyl 90ø). Earlier he was diagnosed with keratoconus in the left eye. The patient had worn myopic spectacles correction for the past 12 years. Two of his sisters had a history of myopia. His general medical history was not contributory. There was no history of excessive eye rubbing, trauma, contact lens wear or episodic redness of the eye.
It occurs in both men and women, presenting between second and the fourth decade, with chief complaints of progressive dimness of vision caused by high "against the rule" astigmatism.Ī 46-year-old male presented, complaining of progressive dimness of vision in the left eye for past 12 years. Pellucid marginal degeneration (PMD) is characterised by non-ulcerative, non-inflammatory, clear thinning of the inferior portion of the peripheral cornea. We report a case of typical PMD with a unilateral presentation. Pellucid marginal degeneration (PMD) is a rare and usually a bilateral condition. Unilateral pellucid marginal degeneration.
How to cite this URL: Basak S K, Hazra T K, Bhattacharya D, Sinha T K. How to cite this article: Basak S K, Hazra T K, Bhattacharya D, Sinha T K. Keywords: Astigmatism, etiology, Cornea, pathology, ultrasonography, Corneal Dystrophies, Hereditary, complications, diagnosis, Corneal Topography, Diagnosis, Differential, Disease Progression,