Eye Pathology I - Adnexal Structures Flashcards

Micropalpebral fissure

Causes of micropalpebral fissures (3)
- Congenital - small eye
- Iatrogenic
- Infectious - feline herpes virus - conjunctivitis, eye disease in cats
Causes of macropalpebral fissures (2)
- Congenital
- Infectious (in rabbits and fowl) - inflammation pulls eyelids away from cornea
Adnexal structures of the eye (3)
- Eyelids
- Nictitating membrane (third eyelid)
- Lacrimal + accessory glands

Macropalpebral fissure


Entropion - external aspect of lower eyelid margin rolling inwards + rubbing cornea -> trauma
What is entropion / ectropion and what are the causes? (9)


Nasal fold trichiasis - eyelashes grow inwards toward the eye + rub against the cornea, the conjunctiva, and the inner surface of the eyelid



What is distichia, ectopic cilia, trichiasis and trichomegaly? (4)


Blepharitis

What is blepharitis and its causes? (4)

What is chalazion/meibomianitis and a sty? (Local blepharitis) (4)

What are the types of general blepharitis and what are the causes? (6)


Puppy strangles - blepharitis
How does the third eyelid become prolapsed?
Due to loosening of / congenital laxity in connective tissue anchoring the nictitans gland to the cartilage of the third eyelid - gland moves


Prolapsed third eyelid - pathognomic appearance


What are the clinical signs of conjunctivitis? (4)

What are the causes of conjunctivitis - infectious and non-infectious? (6)

Common causes of canine conjunctivitis - infectious and non-infectious (7)


Feline conjunctivitis - Chlamydophila (chlamydia) felis
Common causes of feline conjunctivitis (3)



What is feline herpesvirus (FHV-1) - what does it cause, carriers, lesions (4)


Infectious bovine keratoconjunctivitis (IBK)
What is infectious bovine keratoconjunctivitis (IBK) caused by? (4)
Moraxella bovis - gram-negative coccobacillus


Immune-mediated keratoconjunctivitis sicca (KCS) = dry eye

What is immune-mediated keratoconjunctivitis sicca (KCS)? (3)

How does immune-mediated keratoconjunctivitis sicca (KCS) appear grossly? - what are the clinical signs - what would you see?

What test is used to diagnose immune-mediated keratoconjunctivitis sicca (KCS) / for dogs with mucky/red eye?

What are the causes of immune-mediated keratoconjunctivitis sicca (KCS) / dry eye? (8)


Retained spectacles
What are retained spectacles? (3)

Watery discharge in eye summary

Muco(purulent) discharge in eye

Ocular discharge in cat (unilateral/bilateral) summary
