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Flashcards in Eye Deck (69)
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1

Draw and label a schematic of the eye

2

Which structures make up the uvea? What is the function of these structures?

Iris - adjusts volume of light hitting the retina, ciliary body - lens shape, choroidea - vascular supply to the retina

3

What glands are associated with the eyelids?

Tarsal glands - sebaceous, Zeis - sebaceous, Moll - apocrine sweat gland, lacrimal

4

Anophlalmia

Absence of the eye

5

Microphalmia

Small sized eyes

6

Cyclopia

One central eye

7

Name an aetiological cause of cyclopia in lambs

V. californium within 14-15 days

8

Synophalmia

Two eyes fused into one

9

Dermoid

Focal nodule of skin on the cornea

10

Coloboma

Failure to close of the optic fissure

11

Aphakia

Absence of the lens

12

Hypopyon

Pus in the anterior chamber

13

Hyphaemia

Blood in the anterior chamber

14

Endophthalmitis

Inflammation of the internal structures of the eye

15

Panphthalmitis

Inflammation of all of the structures of the eye

16

Blepharitis

Eyelid inflammation

17

Internal Hordeolum

Purulent inflammation of the tarsal gland - STYE

18

Chalazion

Granulomatous inflammation of the tarsal gland

19

Dacryoadenitis

Inflammation of the lacrimal gland

20

Name four infectious causes of conjunctivitis.

BHV1, FHV1, Chlamidophyla psittaci, Mycoplasma felis

21

Describe the gross changes associated with bacterial/viral conjunctivitis.

IBR/FHV - serous-purulent +/- fibrin

Mycoplasma - pseudo-dyphteric

Chylamidophyla - unilateral

22

Which cause of conjunctivitis is associated with unilateral conjunctivitis in the cat?

Chylamidophyla

23

Describe the histological changes associated with bacterial/viral causes of conjunctivitis.

FHV - inclusion bodies in the first few days Mycoplasma - erosive, degenerative n#, coccoid bacteria Chylamidophyla - n#, mo, lpc and inclusion bodies

24

Name three non-infectious causes of conjunctivitis.

Dessication (

25

Describe the gross and histological changes associated with non-infectious conjunctivitis.

Gross - ulcerative margins Histo - Eosinophils +/- lymphocytes, hyperplasia or squamous metaplasia

26

Name two parasitic causes of conjunctivitis in the horse.

Draschia megastoma, Habronema microstoma

27

Describe the gross/ histo changes associated with parasitic conjunctivitis.

Gross - medial canthus, ulcerative nodules, oozing. Histo - granulomatous, eosinophils, larvae

28

Name three non-infectious causes of keratitis.

Physical - corneal trauma, ulcerative. Sunlight - pannus keratitis. Keratitis sicca - reduced tear film

29

Outline the pathogenesis of keratitis

Stromal imbibition (diffusion), secondary bacteria, neovascularisation, repair

30

Name three aetiological agents which cause keratitis.

FHV1, Moraxella bovis, mycotic (aspergillus, alternaria, penicillium)