HTHSCI 2F03 Study Guide - Quiz Guide: Cavernous Sinus, Mast Cell, Xerostomia
26 Dec 2020
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An abscess / infection in a lash follicle which points outwards. Rx: local abx e. g. fusidic acid. Abscess of the meibomian glands which points inwards onto conjunctiva. Clean crusts of lashes c warm soaks. Low lid eversion watering and exposure keratitis. Assoc. c ageing and facial n. palsy. Difficulty in lid closure over the globe which may exposure keratitis. Temporary tarsorrhaphy may be needed if corneal ulcers develop. Yellow vascular nodules either side of the cornea. Similar to pinguecula but grows over the cornea . Assoc. c dusty, wind-blown life-styles, sun exposure. Infection spreads locally: e. g. from paranasal sinuses, eyelid or external eye. Usually a child c inflammation of the orbit + lid swelling. Pain and range of eye movement. Local extension meningitis and cavernous sinus. May follow carotid aneurysm rupture c reflux of blood into cavernous sinus. Anti-tsh abs retro-orbital inflammation and lymphocyte infiltration swelling. Refractive errors arise from disorders of the size and shape of the eye.
