SOCI 3630 Chapter Notes - Chapter 3.1: Extraocular Muscles, Eye Surgery, Macular Degeneration
4 Jun 2020
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Pupil size decreases & lens loses elasticity this means it loses it"s ability to change shape to accommodate for near vision (presbyopia) w/ an onset of 40 years old. By 70 the normally transparent fibres of the lens have thickened & become yellow nuclear sclerosis or start of a senile cataract. Visual acuity decreases after age 50 & even more so after age 70. Near vision is commonly affected b/c of the decreased power of accommodation. Older adults need more light to see b/e of decreased adaptation to darkness. Xanthelasma are soft raised, yellow papules on the eyelids at the inner canthus, commonly occur in the fifth decade & are more frequent in women occur w/ high & normal cholesterol. With age, the retinal structures have less shine, bvs look paler, narrower, and attenuated. Glaucoma: increased intraocular pressure, chronic open-angle = loss of peripheral vision. Diabetic retinopathy: leading cause of visual impairment in pp <65.
