Abstract
This communication is based on the result of more than 250 examinations, including iridodialysis, iritis, uveitis, kerato-iritis, iridocyclitis, interstitial keratitis, glaucoma of all forms and cataract of many types. The usual routine has been followed with the slit lamp, using binocular 75 and ocular 33. Special studies have been made at greater magnification. To present some new facts and emphasize the importance of this examination, it has seemed best to review part of our present knowledge regarding iris anatomy, and then to discuss embryologic remnants and pathologic changes. An examination of the iris with oblique illumination will materially aid in understanding the usual contour and some of the common color arrangement. The microscopic section shows the zone about the pupil, which is usually a dense brown. There is a distinct bulge back of this margin which we call the spongy portion of the iris, and the most prominent part of
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