Equine Opthalmolpgy 2

Question 1

What is Phthisis bulbs?

Answer 1

Shrinking of the eye

• can occur after lens extraction
• check eyelashes (normal = horizontal, abnormal = downwards)

Question 2

What is Equine recurrent uveitis?

Answer 2

Uveitis/Iridocyclitis/Periotic ophthalmia/Moon blindness

• we still dont know cause: Lepto/viruses/Onchocera
• worldwide
• 12% of all horses
• appaloosas

Acute and chronic

Question 3

What are the symptoms of acute ERU?

Answer 3

1) Pain
- Photophobia
- belpharospasm
- lacrimation

2) conjunctivitis
3) cornea edema/ vascularisation
4) hypopyon (Pus in the anterior chamber)
5) mitosis
6) Posterior synechiae

Question 4

What is Uveitis?

Answer 4

Iris,colliery body, choroid

Inflammation of entire vascular tunic

Question 5

What makes up the uvea?

Answer 5

Iris
Ciliary body
Choroid

Question 6

What occurs during hypopyon?

Answer 6

Macrophages fight infection = Puss = dead white blood cells

-accumulate in anterior chamber

Question 7

What is posterior synechiae?

Answer 7

Iris attaches to the anterior surface of the lens

Question 8

What is anterior synechiae?

Answer 8

Iris sticks to Posterior surface of the cornea

Question 9

What is the treatment for ERU?

Answer 9

1) analgesics : Phenylbutazone
2) Mydriatics: Atropine, dark stall
3) topical corticosteroids(make sure cornea is intact)
4) Surgery: Vitrectomy

Question 10

What must you always check before using topical corticosteroids in the eye?

Answer 10

Check for corneal ulcers

Question 11

How does Vitrectomy eleviate ERU?

Answer 11

Vitreous body becomes liquified with ERU, so cant push pinna up against the globe wall.

Suck out and replace. shows promise but not that much

• vitreous cutter and suction
• infusion line