![]() "A new FDA approved option for keratoconus filling the gap between contact lenses and a corneal transplant". Unknown parameter |accessyear= ignored ( |access-date= suggested) ( help) Unknown parameter |accessmonthday= ignored ( help) Department of Ophthalmology, University of Crete. "Intacs for early pellucid marginal degeneration". "Signs of pellucid marginal degeneration should rule out refractive surgery". ![]() Unknown parameter |accessyear= ignored ( |access-date= suggested) ( help) Unknown parameter |accessmonthday= ignored ( help) CS1 maint: Multiple names: authors list ( link) "Unilateral pellucid marginal degeneration". Rarely, it may cause acute vision loss with severe pain due to perforation of the cornea. It typically presents with painless vision loss affecting both eyes. The use of intacs implants has been tested as a treatment for PMD, with slight improvement in visual acuity noted after eleven months, and intacs have been used with keratoconus with success. Pellucid marginal degeneration ( PMD) is a degenerative corneal condition, often confused with keratoconus. ![]() Patients wearing contacts report increased problems with glare and contrast sensitivity, but it is not clear if this is due to the corneal disease, or the contact lenses themselves. Visual acuity can not usually be corrected with the use of corrected lenses, but success has been shown with the use of rigid contact lenses combined with over- refraction. Due to the thinning of the cornea, procedures such as LASIK and PRK would make the patient a poor candidate. Like keratoconus, PMD rules a patient out for refractive surgery. Deterioration can become severe over time. Visual function declines as a result of the irregular corneal shape, resulting in astigmatism, and causing a distortion in vision. No known cause for the disease has been found. No identifiable factors have been found to link to race, sex, or age, but most cases present early in life, in the age group of 20-40. Upon examination by an ophthalmologist, the patient exhibits normal corneal thickness in the center, with an intact central epithelium, but the inferior cornea exhibits a peripheral band of thinning. Normally, PMD does not present with vascularization of the cornea, scarring, or any deposits of lipid. ![]() Unlike keratoconus, pain is not normally present, and aside from the visual deterioration, no symptoms accompany the condition. Low sensitivity of ICD-10 coding for culture-confirmed candidemia cases in an active surveillance. Incidence of PMD is rare, but it is unknown how many cases occur each year, due in part to the confusion of the condition with keratoconus. Pellucid marginal corneal degeneration in a teenager. ![]()
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