Conjunctiva Flashcards
What epithelium is the conjunctiva?
Non keratinised, stratified squamous epithelium
What cells does the conjunctiva contain that produce which part of the tear film?
Goblet cells
Mucoid portion of the tear film
What type of bacteria is most commonly found as a commensal on the conjunctiva Gram positive or neg?
Gram positive
What is the immune protection in the conjunctiva called?
Conjunctival associated lymphoid tissue (CALT)
How do conjunctival vessels differ from deeper vessels?
What test can you do to distinguish conjunctival v episcleral/ scleral vessels?
Conjunctival vessels are narrow, branch frequently and often tortuous, move with the eyeball. Deeper ones are wider, straighter, rarely branch
Topical epinephrine (adrenaline) 1-2% will blanch conjunctival vessels quickly
Where do dermoids normally occur in the eye?
Lateral limbus
Where is FHV-1 in carrier cats?
Where in the eye does the virus replicate?
Trigeminal nerve ganglia
Corneal epithelium
What concurrent disease should you not use famciclovir with (2)?
Renal/ hepatic disease
What is the treatment for chlamydia felis?
How long for?
Topical chortetracycline (ophtocycline) QID Systemic tetracyclines- doxy. 3-6w ALL cats in the household
What is the first ocular clinical sign of mycoplasma spp in cats?
Chemosis
What breed and sex is predisposed to ligneous conjunctivitis? What are the clinical signs? And other areas affected? Cause? Treatment
Doberman
Female
Thickened, hyperaemic, palpebral conjunctiva with opaque membranes
Oral mucosa, respiratory and urinary tract
Plasminogen deficiency
Topical and oral immunosuppressants
What is lipogranulomatous conjunctivitis in cats?
Which eyelid is more commonly affected?
Treatment?
Non ulcerated white/pale yellow nodules within the palpebral conjunctiva
Upper eyelid
Curettage/ cryotherapy/ oral ABs + steroids
May recur!
What is the difference between conjunctival v deeper vessels?
Conjunctival vessels;
Don’t cross limbus
Narrower
Branching
Where does herpes replicate?
Which causes what to the cell?
Ocular and nasal Epithelial cells
Cell lysis
