Indirect illumination Slit lamp

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indirect lateral illumination of corneal ulcer


with method, light enters eye through narrow medium slit (2 4 mm) 1 side of area examined. axes of illuminating , viewing path not intersect @ point of image focus, achieve this; illuminating prism decentered rotating vertical axis off normal position. in way, reflected, indirect light illuminates area of anterior chamber or cornea examined. observed corneal area lies between incident light section through cornea , irradiated area of iris. observation against comparatively dark background.








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