A man, 55 years of age, had had recurrent ulcers of the cornea of the right eye for eighteen years. The last attack was about two years before this report was written.
Examination of the right eye showed a moderately dense, diffuse central corneal scar. In the anterior chamber, a curious picture was present. Figure 1 shows this to be a spiderweb-like glassy, tubular, semitransparent network, seen particularly well in retro-illumination. Branching ends of this network are attached to the posterior surface of the cornea, and all except one have an oval or circular attachment. This one is drawn out to a fine point. There are a few brown pigment dots in the lumen of two of the lower branches near their attachment to the cornea ; other dots are seen scattered on Descemet's membrane about the end of the lower nasal branch. Figure 2 shows this network to be