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AHT 113 Ocular
Ocular Disorders
34
Veterinary Medicine
Not Applicable
03/15/2009

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Cards

Term
What is entropion?
Definition
Inward curling of the eyelid
Term
What 2 facial conformations predispose a patient to having entropion?
Definition
Brachycephalic breeds and excessive skin folds.
Term
What is ectropion?
Definition
Outward curling of the eye.
Term
How is ectropion diagnosed?
Definition
Physical exam
Term
What is trichiasis?
Definition
Normal hair coming in contact with the cornea and conjunctiva.
Term
What are 4 clinical signs of trichiasis?
Definition
Blepharospasm, epiphoria, conjunctivitis, keratitis.
Term
What is distichiasis?
Definition
Extra eyelashes typically arising from the meibomian duct openings below the eyelid margins.
Term
What is the cause of distichiasis?
Definition
Genetic
Term
What does KCS stand for?
Definition
Keratoconjunctivitis Sicca
Term
What is the most common cause of KCS?
Definition
Immune mediated adenitis
Term
What is the normal value for a schirmer tear test?
Definition
15mm/min or greater
Term
What is the surgical treatment for KCS and what does it do?
Definition
Parotid duct transportation. Delivers saliva to the eye to keep it moist.
Term
What is the common name for prolapsed gland of the nictitans?
Definition
Cherry eye
Term
What is the prognosis for cherry eye?
Definition
The surgery is not 100% effective and it may occur in the other eye.
Term
What is chronic superficial keratitis?
Definition
Progressive change whewre blood vessels and scar tissue invade the cornea.
Term
What worsens chronic superficial keratitis?
Definition
UV light
Term
What is another name for chronic superficial keratitis?
Definition
Pannus
Term
What type of dog is predisposed to pannus / superficial keratitis?
Definition
German Shepherds
Term
Name 2 types of trauma that may cause corneal ulcers and give examples for each.
Definition
Mechanical: claws, branches, foreign body.
Chemical: Shampoo
Term
Name an infectious cause of corneal ulcers.
Definition
Feline herpes virus 1
Term
How are corneal ulcers diagnosed?
Definition
Fluorescen stain
Term
What type of drug do you not want to use on a corneal ulcer and why?
Definition
Steroids, because they slow the healing process.
Term
What is a descemetocoele?
Definition
An ocular emergency. Loss of corneal layers down to desmets membrane, the innermost layer of the cornea.
Term
What would you see on a flurosine test done on a patient that has a descemetocoele?
Definition
Nothing, desments membrane is hydophobic thus the stain wouldn't stick.
Term
What is glaucoma?
Definition
An ocular emergency characterized by increased intraocular pressure.
Term
List 3 clinical signs of glaucoma.
Definition
Blepharspasm, blindness, conjunctival hyperemia, conjunctivitis, corneal edema, mydriasis, bupthalmia.
Term
How is glaucoma diagnosed and what would indicate a positive reading?
Definition
Tonometry pen. To indicate glaucoma, the reading would need to be more than 25mmHg.
Term
What is the prognosis for glaucoma with and without surgery?
Definition
Without surgery: Patient will go blind.
With surgery: Patient will go blind but it will take MUCH longer.
Term
What is a cataract?
Definition
Opacity of the lenz of the eye.
Term
What would be associated with rapidly progressive cataracts?
Definition
Diabetes
Term
Name and describe the condition often mistaken for cataracts.
Definition
Nuclear/lenticular sclerosis. normal change in the eye related to aging. The pupils appear to be cloudy.
Term
What does PRA stand for and what is it?
Definition
Progressive retinal atrophy. Progressive degeneration of the retina.
Term
Describe the blindness that is associated with PRA?
Definition
Initally night blindness that progresses to light blindness, then total blindness.
Term
What is the treatment for an animal with progressive retinal atrophy?
Definition
Not much. All you can do it keep the pet in an environment that is safe for a blind dog.
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