CYSTS OF THE IRIS AND CORPORA NIGRA.
Mayer speaks of these lesions in horses, but it is very difficult to diagnose them correctly, even with the aid of the ophthalmoscope. The very manifest bulging at the part may be due to excess of pigment, especially in the corpora nigra, and an exploratory puncture would only be warranted when the protrusion became excessive and injurious. One such puncture by Eversbusch led to infection and loss of the eye.