Case Reports

Unilateral pellucid marginal degeneration: about a case

Case Report Details

First Author: B.Mrini MOROCCO

Co Author(s):    M. Karima   F. Boudguigue   C. Ouafae              

Abstract Details

Purpose:

Pellucid marginal degeneration is a progressive non-inflammatory ectasiant disease, affecting the lower part of the cornea. It is often confused with keratoconus for clinical, histological and topographical similarities.

Setting:

The aim of our work is to study the clinical and topographical characteristics of the disease, its differential diagnosis and therapeutic strategies through observation and a review of the literature.

Report of Case:

We report the case of a 37-year-old patient with no particular history who presents to ophthalmology for progressive loss of visual acuity in the right eye without any notion of redness or associated pain. The clinical examination found a CLD visual acuity at 1 m in OD and 10/10 in OG. In biomicroscopy, we observed a thinned strip of cornea below, and separated from the limbus by a crescent of normal cornea at the level of the right eye. The cornea of ​​the helping eye is normalThe topography of the right eye showed a thinning of the cornea which predominates in the lower position on the pachymetric map. The elevation maps objectified a corneal projection above the thinning area. On the axial map, we noted a flattening of the upper vertical hemimerids and a camber of the oblique and lower vertical hemimerids. A previous astigmatism of -8.5 D at 107 ° was noted on the OD, and of -0.4 D at 142.5 ° on the OG. On the other hand, the left eye presented a normal topographic aspect. As a treatment, a scleral glass at the level of the right eye has been proposed.

Conclusion/Take Home Message:

DMP is an idiopathic condition, rarely unilateral and responsible for irregular astigmatism. Corneal topography holds a special place in its diagnosis. Several surgical procedures have been used in an attempt to improve the visual acuity when glasses and lenses do not allow adequate visual correction.

Financial Disclosure:

None