Disease of the Optic Nerve in Cats
 
Glaucoma is a condition in which high pressure occurs in the eye, with a failure of normal fluid drainage from the eye. A chronic condition with pressure against the optic nerve will eventually cause permanent damage to the optic nerve, resulting in blindness.

 
Symptoms and Types
 
There are two main types of glaucoma: primary and secondary. Symptoms for sudden primary disease, due to the eye's inability to drain through the filtration angles of the eye, are as follows:

High pressure within the eye