Patients with either sign should be considered pellucid suspects and poor candidates for refractive surgery, Dr. The presence of "crab claw" topography will indicate pellucid, but in early cases what will more likely be seen is inferior flattening characterized by an isolated inferior blue spot. However, since the cornea typically gets thicker from the center to the periphery, clinicians should be suspicious if there is little difference between the central and inferior pachymetry. Pellucid Marginal Degeneration Pellucid marginal degeneration Other Names: About the Disease Diagnosis & Treatment Living with the Disease Research Navigate to sub-section Diagnostic Process Seek Medical Care Knowing where to start the diagnostic process can be hard. Patients may appear clinically normal and have normal pachymetry, if it is performed centrally or paracentrally. OBJECTIVE: To report the clinical features and outcome of patients with pellucid marginal corneal degeneration (PMCD). The key to recognizing early cases of pellucid is topography, Dr. Another difference between pellucid marginal degeneration and keratoconus is that the onset of pellucid tends to be in the 30s, rather than around the time of puberty. 1 The term pellucid meaning clear to denote the corneal clarity was used for the first time by Schlaeppi. In pellucid marginal degeneration, corneal thinning typically occurs from the 4 to the 8 o'clock position approximately 1 mm from the inferior limbus. Pellucid marginal corneal degeneration (PMD) is a progressive, noninflammatory ectatic corneal disorder that more commonly involves the inferior cornea separated from the limbus by a relatively uninvolved area of 1 to 2 mm in width. It typically presents with painless vision loss. Rabinowitz, MD, director of ophthalmology research, Cedars Sinai Medical Center, Los Angeles. Pellucid marginal degeneration, is a degenerative corneal condition, often confused with keratoconus. #Pellucid marginal degeneration how toAlthough it is atypical and rare, clinicians should learn how to identify pellucid and screen patients for it preoperatively, said Yaron S. Pellucid marginal degeneration is a subtle condition that could lead to corneal ectasia following laser eye surgery.
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