Extras Flashcards
What is trachoma?
Caused by Chlamydia trachomatis
Itching, discharge –> pain and blurred vision –> scarring of eyelids –> ulcers and vision loss
What are the ocular manifestations of RA?
Keratoconjunctivitis sicca Episcleritis Scleritis Corneal changes Retinal vasculitis
Which antibiotic is most effective against pseudomonas?
Tobramycin
Which type of imaging will detect thyroid eye disease?
MRI STIR
Which muscle is least commonly affected in thyroid eye disease?
Lateral rectus
What is keratoconus?
Cornea is unable to maintain it’s round shape so becomes cone shaped
What are some ocular manifestations of sarcoidosis?
Uveitis Episcleritis Eyelid abnormalities Conjunctival granuloma Optic neuropathy Lacrimal gland enlargement Orbital inflammation
Which organism can penetrate an intact corneal epithelium?
Corynebacterium diphtheriae
What is a Vossils ring?
Ring of pigment deposition on anterior lens capsule surface
Occurs as a result of trauma
What is a Marcus Gunn pupil?
Pupils respond differently to light
Caused by optic nerve damage / retinal pathology
What collagen types is the sclera made of?
Randomly arranged collagen type 1 and type 3
What is Sherrington’s law?
Increased innervation to an extra ocular muscle is accompanied by a reciprocal decrease in innervation to its antagonist
What cells in the retina develop first?
Muller cells
In retinal detachment, what detaches from what?
Photoreceptor layer detaches from the RPE
