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What is Fleischer ring is characteristic of - and explain in detail?
In keratoconus slit lamp examination may show thinning and ectasia of central cornea, opacity at the apex and Fleischer's ring at the base of cone, folds in Descemet's and Bowman's membranes. Very fine, veical, deep stromal striae (Vogt lines) which disappear with external pressure on the globe are peculiar feature.Reference:Comprehensive ophthalmology,AK Khurana,4th edition,page no.119