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Jesse S. Wyler, M.D.
JAMA. 1917;LXIX(22):1902. doi:10.1001/jama.1917.02590490066019.
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To the Editor:  The Journal has recently published two contributions on corneal tattooing. It seems to me that almost ideal results can be obtained by a modified Froehlich method, which I have followed in several cases. A von Hippel trephine is used to outline the area to be stained, cutting only through the epithelium and upper lamellae of the cornea. With a keratome this is carefully dissected loose, leaving the flap hanging at one side by a small hinge of tissue. The India or Chinese ink emulsion, worked up in a mercuric chlorid solution, is now applied and the flap turned back in place. A beautiful black round pupil remains. If the operation is performed in this manner, the stain is permanent, as can be shown in a case in which it was done six years ago. Dr. Allport's method is very similar excepting for his failure to replace


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