PSYC-3220 Lecture Notes - Lecture 5: Sensorineural Hearing Loss, Macular Degeneration, Cochlear Implant
20 Sep 2019
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Document Summary
Risk factors - age and family history. Several parts of eye less e ecting - pupil decreased ability to accommodate, reduced visual acuity and less dark adaptation. Retina - pressure in eye (glaucoma) distorts colour and sharpness of image, surgery, eye drops, laser treatment, macular degeneration: central vision loss. A ects many aspects of vision: hearing: By age 65, about 1/3 of adults have some signi cant hearing impairment. Sensorineural hearing loss: shortening of loudness scale (loud-soft discrimination) Prevention: avoid loud noises, loss greater with increased exposure to noise. Treatment: hearing aids, cochlear implants: taste and smell, related. Decline begins at 30, more markedly at 65-70. Fewer taste buds, especially sweet and salty receptors. Calcium loss -> less dense, more brittle bones. Greater for women: smaller bones, loss of estrogen, greater decline with age. Falls, major source of head injuries in elderly.
