![]() Corneal topography was characteristic for PMD. This should be compared with the much rarer pattern seen in classic PMD, where there is a clear band of thinning running horizontally 1 to 2 mm from the inferior limbus ( Figure ). We analyzed a case of bilateral PMD patient and treated one eye with corneal collagen cross-linking (CXL) therapy. Primary prevention No preventative strategies exist for PMD. Many studies exploring the different treatment modalities for pellucid marginal degeneration and keratoconus rely mainly on anterior curvature maps to establish the diagnosis of these ectatic disorders, and either do not utilize or disregard information provided by pachymetric maps and posterior elevation maps. A review of the preoperative thickness map in this article reveals typical findings fairly typical of keratoconus with central or paracentral apical thinning and no inferior band. A new treatment called corneal collagen cross-linking may help to slow or stop keratoconus from progressing, possibly preventing the need for a future cornea transplant. The classic description of PMD was a corneal thinning disorder characterized by an inferior band of thinning 1 to 2 mm from the inferior limbus associated with a flat vertical meridian and a sharp change in curvature or shape at or immediately above the band of thinning. There are some methods described in the treatment. The use of curvature maps to diagnose PMD is limited and prone to artifact, and we have suggested the use of a full corneal thickness map to separate better these two entities. Pellucid marginal degeneration (PMD) is a rare disorder of the peripheral cornea, which is difficult. 2 appeared concurrently in another journal describing the positive results of transepithelial phototherapeutic keratectomy followed by CXL in PMD. The ectatic zone, which is 1-2 mm from the limbus, lies above the point of the maximum corneal thinning. 1 advocates for the use of corneal crosslinking (CXL) as a potential treatment of pellucid marginal degeneration (PMD). It is characterized by a peripheral crescentic band of thinning, usually in the inferior cornea. The distinction, regardless of whether it is real, becomes important when one advocates a specific treatment method that may not be applicable for both patient populations. Pellucid marginal corneal degeneration (PMCD) is a bilateral, noninflammatory, peripheral corneal thinning disease. For most, this is nothing more than an academic exercise with little clinical significance, because most view these two entities as different points on a clinical continuum. The diagnosis of PMD and its distinction from keratoconus has been an ongoing discussion in the cornea and topography arena. The same month, another article appeared describing the use of a high-power toric intraocular lens for treatment of PMD. advocates for the use of corneal crosslinking (CXL) as a potential treatment of pellucid marginal degeneration (PMD). ![]() ![]() They join a number of others advocating the use of ICRs for the correction of PMD. In their recent article, Kubaloglu and associates reported a favorable result with the insertion of a single 210-degree arc length intrastromal corneal ring (ICR) for the treatment of pellucid marginal degeneration (PMD). ![]()
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