Congenital ocular dz and foals Flashcards Preview

equine Ophtho junior > Congenital ocular dz and foals > Flashcards

Flashcards in Congenital ocular dz and foals Deck (23):
1

Microphthalmia (6)

1. small globe
2. +/- vision
3. Secondary to hostile uterine environment?!?!
4. Relatively common in Thoroughbreds
5. May effect skull development
6. Secondary irritation - entropion, pocket syndrome

2

Strabismus (4)

1. Frequently assoc with vision deficits
2. Can be congenital or inherited - appies esp
3. Traumatic
4. Not usually reversible

3

Dermoids

1. Normal tissue, abnormal location - cornea, conj, eyelids
2. Tx - sx resection +/- reconstruction

4

Eyelids (5)

1. Entropion
2. Ectropion
3. Dermoids
4. Agenesis
5. Trauma

5

juvenile Entropion (3)

1. dehydration
2. assymmetric growth
3. Tx temporary tacking - sutures/glue

6

Nasolacrimal apparatus (4)

1. Dacryocystitis - secondary to obstruction of NLD
2 Imperforate NL puncta
3. NL punctal atresia
4. NLD aplasia

7

Imperforate puncta (3)

1. Usually nasal punctum
2. Treatment - flushing, incising bulges
3. TX secondary inflamm - abx NSAIDs (topical vs systemic)

8

Punctal atresia (4)

1. TX- make a new hole (general anesth)
2. +/- contrast radiography
3. Place catheter, leave in until complete epithelialization of canal (4-6 weeks)
4. C & S?!?!?!?! Systemic NSAIDS

9

Ductal Atresia

Refer these to surgery

10

Corneal ulcers (3)

1. assoc w/ dec sensation
2. Secondary to low tear production
3. Superficial simple vs indolent vs complicated vs melting

11

Corneal ulc tx (6)

1. address prim cause - tacking entropion, tx uveitis, maybe ectopic cilia
2. Topical abx
3. topical mydriatics
4. systemic anti-inflammatories
5. anti-collagenases
6. prevent self trauma

12

Melting corneal ulcers (4)

1. emergency
2. ush sterile, C&S anyways
3. SPL and tx hourly
4. May need surgery

13

Aniridia (4)

1. ush bilateral
2. Lens equator, ciliarry process are visible
3. +/- photophobia and blepharospasm
4. congenital in QHs, Belgians, TB w/cataracts

14

Multiple Congenital ocular anomalies

1. Rocky Mountain Horse
2. Macrocornea
3. Iridal hypoplasia
4. Ciliary body cysts
5. Congenital miosis
6. cataract
7. Retinal folds, dysplasia, detachments
8. Severe cases AqH outflow probs - glaucoma

15

MCOA syndrome (2)

1. co-dominant trait with incomplete penetrance
2. Silver dapple locus, s.t. about chocolate and flaxen hair
3. PMEL17 Mutation

16


anterior Uveitis (3)

1. ush secondary to septicemia (E. coli, rhodococcus)
2. CS: green
-Aq flare
-fibrin in AC
-Miosis
-conj hyperemia, chemosis
-hypopyon, hyphema
-keratic precipitates
3. TX prim and secondary dz

17

Ant uveitis tx (3)

1. topical anti-inflammatories (pred, NPD)
2. Mydriatic (atropine)
3. Intracameral TPA

18

Glaucoma (2)

1. ush secondary in horses
2. CS: corneal edema, linear branching stria, IOP > 25 mmHg, mydriasis, pupil and iris anomalies, blindness, buphthalmos)

19

Lens abnormalities (3)

1. congenital cataracts - most common -sx removal
-younger/smaller the better
2. uveitic cataracts - progression after septicemic insult
3. lens lux

20

Retinal dysplasia

Often seen with other ocular anomalies

21

Posterior uveitis (4)

1. chorioretinitis, retinal detach, hemorrhage
2. ush result of septicemic dz w/ neuro involve
3. tx with systemic anti-inflamm - no topical meds
4. often results in retinal degeneration

22

Retinal hemorrhage (3)

1. common, no tx necessary
2. common after difficult parturition/trauma
3. may be present with posterior uveitis

23

Retinal detachments (2)

1. Congenital or post-nflammatory (post uveitis)
2. Treatment ush unsuccessful