DISEASES OF THE CORNEA 103 



may be seen radiating over the surface. Cicatricial 

 bands form over the point of perforation, causing a 

 special thickening of the wall at that point. The anterior 

 chamber becomes obHterated, as the iris is closely ad- 

 herent to the posterior portion of the cornea. 



Fig. 23. — Staphyloma of the cornea of the human eye. Prepared by 

 the author. This condition was due to trachoma. To the right of the 

 center of the cornea is the point of ulceration and perforation, with exu- 

 dation and thickening. To the left the iris can be seen glued to the 

 cornea, which is extremely thin. The light spot in the center is a bubble. 



A partial staphyloma is confined to one portion of the 

 cornea, is cone shaped, and has a white apex. The 

 remainder of the cornea is clear. The iris is only ad- 

 herent at the point of perforation. This usually pro- 

 duces dislocation of the pupil, and, with the irregularity 

 of the corneal curvature, interferes with vision. 



Treatment. — As ulceration of the cornea is the primary 



