summer and fall.

_The symptoms appear_ suddenly. The animal is feverish, the eyes closed and
the cheeks are wet with tears. The cornea becomes clouded, white and
opaque. In severe cases, the blood-vessels around the margin of the cornea
become prominent, and ulcers form on its surface. The animal's appetite is
impaired or lost. There is loss of flesh and temporary blindness. The
blindness in one or both eyes may persist for a period of from two weeks to
several months. Permanent blindness is comparatively rare.

_The preventive treatment_ consists in practising the necessary precautions
against the introduction of the disease into the herd, and in carefully
quarantining the first cases of the disease that appear. The affected
animal should be given a darkened stall, and fed a very light ration until
the acute inflammation has subsided. From one to one and one-half pounds of
Glauber's salts should be given. The _local treatment_ consists in the
application of antiseptic lotions or powders to the eye. Equal parts of
boric acid and calomel, dusted into the eye twice daily with a powder
blower, is a very effective treatment.


QUESTIONS

1. Name the different structures that form the shell of the eye; name and
describe the different media of the eye.

2. Give the general method of examining the eyes of horses.

3. What is conjunctivitis? Give causes and treatment.