MEDRADSC 2T03 Lecture Notes - Lecture 12: Uvea, Melanoma, Eyelid
27 Jun 2016
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Document Summary
Race: caucasian, people with light eye colour (blue/green eyes) Genetic: dna errors of healthy eye cells. Abnormal skin pigmentation involving eyelids and adjacent tissues. Ocular melanocytosis: increased pigmentation on the uvea. Sclera: tough white connective tissue, covers outside of eyeball, protective covering, muscles attach to sclera to move eye. Cornea: clear, dome shape covering at front of eye, lets light in, doesn"t have blood vessels. Iris: thin, muscular, coloured part of eye, opens and closes the pupil to change amount of light let in. Chorioid: thin layer, contains blood vessles, contains melanocytes which produce pigment-producing cells and help absorb excess light and minimise reflections in eye. Ciliary body: muscular ring that helps with focus by changing shape of lens, contains cells that make aqueous humor. Inner layer: retina: thin layer at back of eye, made of. Image link: http://www. curetoday. com/tumor/cll/treatment/cdr0000062846 nerve cells that are sensitive to light, connected to brain by optic nerve.
