Quick Eye Anatomy Review
Anterior wall of eye
Contains and drains aqueous
Fluid produced by the ciliary body
Maintains intraocular pressure and provides nutrition to intraocular structures
Regulates light into the eye
Focusing apparatus of the eye
Clear, gelatinous structure
10 cell layers of conduction tissue to transmit light images to the brain
An extension of the brain, allows transmission of images to the brain
Common Ocular Diseases
Keratoconjunctivitis sicca (KCS, dry eye)
Poor tear production or quality
b. Breed predisposition: shi tzu, cocker spaniel, pug, boston terrier, westie, bulldog etc.
Normal tear production is 15-25 mm in 60 seconds
Permanent disease, controllable, but not curable—medications must be used lifelong!!
e. Tear stimulant therapy: Tacrolimus or cyclosporine
f. Anti-inflammatory therapy: neopolydex
g. Tear substitutes: Genteal gel
Can be blinding if left untreated, or result in perforating ulcers
Corneal erosions or ulcers
Wound of varying depth in the cornea, can be superficial or deep
Most corneal nerves are superficial, so these can be the most uncomfortable
The underlying cause needs to be addressed in order for the ulcer to heal
Surgical options for patients over 50% depth
e. E-collar is important!
Elevation in intraocular pressure (15-25 mmHg is normal)
b. Breed predisposition: cocker spaniel, basset hound, Alaskan breeds, chow chow, shar pei, shi tzu, boston terrier, etc
c. Sink analogy: faucets produce fluid in the eye and it is the drain that clogs.
If a primary glaucoma it will ALWAYS affect both eyes eventually
With preventative treatment in the unaffected eye you can delay the onset of glaucoma 4-fold