HTHSCI 2F03 Study Guide - Quiz Guide: Meibomian Gland, Infraorbital Nerve, Rhabdomyosarcoma

• School: McMaster University
• Department: Health Sciences
• Course: HTHSCI 2F03
• Professor: Bruce Wainman

Document Summary

Localised reddening: can be moved over sclera. Vessels may be moved over the sclera. Acuity, pupil responses and cornea are unaffected. Acanthamoeba: protazoal infection affecting contact lens wearers swimming in pools. 20% of all shingles (only commoner in thoracic dermatomes) Pain in cnv1 dermatome precedes blistering rash. Nose-tip zoster due to involvement of nasociliary branch. Chance of globe involvement as nasociliarry nerve also supplies globe. Lights / flashes preceding visual loss: detached retina. Poorly controlled dm: vitreous bleed from new vessels. Optic nerve damaged if posterior ciliary arteries blocked by inflammation or atheroma. Non-arteritic aion: htn, dm, lipids, smoking. Unilateral loss of acuity over hrs days. Optic disc may be: normal, swollen, blurred. Small bleeds small black dots / ring floaters. Large bleed can obscure vision no red reflex, retina can"t be visualised. May use b scan us to identify cause. Vitrectomy may be performed in dense vh. Afferent pupil defect (may precede retinal changes)