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We present a case of progressive pellucid marginal degeneration (PMD) treated with cross-linking (CXL) after a previous unsuccessful implantation of intracorneal ring segments. One year after surgery, an increase in the corneal biomechanical properties accompanied by an improvement in corrected visual acuity and a decrease in the magnitude of corneal coma-like aberrations was observed. However, the magnitude of the refractive cylinder and keratometry increased whereas the internal astigmatism was reduced by 3.93 D. CXL in a cornea with a progressive PMD seems to induce not only changes in the anterior corneal surface, but also in the posterior corneal surface.

Cross-linking for the Management of Pellucid Marginal Degeneration in a Case of an Unsuccessful Implantation of Intracorneal Ring Segments