Abstract

DO.17.08

Diagnostic findings and therapeutical options in patients with Pellucid marginal corneal degeneration (PMCD)

Grünauer-Kloevekorn C.
Department of Ophthalmology, University of Halle

Up to now cases with Pellucid marginal corneal degeneration (PMCD) were diagnosed based on the presence of corneal thinning with ectasia above or below the area of thinning and the typical findings in color coded maps of video-keratoscopy.
Nevertheless, to quantify these changes further corneal parameters, such as sectorial eccentricities, Fourier series harmonic analysis, the HOA RMS and the aberration coefficient are necessary. Furthermore because of the more severe complications in comparison to patients with other ectatic corneal diseases early detection of the PMCD might be beneficial.
Surgical options to improve the irregular corneal conditions include intrastromal corneal rings, thermocauterization and a great variety of different types of keratoplasty. None of the present modalities of treatment reliably achieve an optimum visual result. Thus surgical intervention should be delayed as long as possible and contact lens fitting should be prior to surgical approaches.
The aim is to evaluate the special corneal conditions in patients with PMCD using videokeratoscopic indices and to clarify which special back design may be used to improve contact lens tolerance and visual acuity in cases of PMCD.

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