Conditions which might necessitate referral to a veterinary ophthalmologist include:

• Glaucoma   
• Cataract   
• Vision Loss   
• Congenital Eye Abnormalities
   (birth defects)
• Lens Luxations
• Uveitis (intraocular inflammation)
• Corneal Disease
• Retinal Disease
• Dry Eye
• Eyelid Abnormalities
• Ocular & Eyelid Neoplasia (cancer)
• Ocular Trauma

Glaucoma 
A condition associated with elevated pressure within the eye. It commonly causes permanent blindness in dogs. 

Cataract 
A clouding of the lens inside the eye; it is one of the most common causes of blindness in dogs. 

Progressive Retinal Atrophy
An inherited degeneration of the visual cells (rods and cones.)

Dry Eye
A condition in which the tear glands are unable to provide adequate moisture to the eye.

Entropion
A "rolling in" of the eyelid(s); in some cases the eyelashes rub on, and irritate, the cornea.

Corneal Ulcer
An abrasion of the clear surface of the eye; often painful; may be caused by trauma.

Cherry Eye (Prolapsed gland of the nictitating membrane)
A prolapse of the tear gland associated with the third eyelid.

Herpesvirus
A viral infection of the cornea and conjunctiva in cats; may or may not be associated with symptoms of an upper respiratory infection.