In health they are clear and bright, but in disease they become dull, and give a heavy appearance to the countenance; though after long continued irritation they will assume a degree of quickness which is very remarkable, and a sort of pearly brightness which is better known from observation than it can be from description.

The most beautiful arched form is thus obtained, and this, together with the dyeing of the eyelids, increases uncommonly the brightness of the eye.