PubMed · 1020083
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P T Gavaris, L H Seaton. Lid eversion clamp.. https://pubmed.ncbi.nlm.nih.gov/1020083/
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Ninety two patients suffering from porphyria cutanea tarda were examined ophthalmologically in a paired case-control study. The incidence of pinguecula and that of pterygium were 8 times and 2 times higher, respectively, in PCT patients that in the control group. The photodamage of the conjunctiva is presumed to be a result of the photoactivity of uroporphyrin in the tissues.
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