PSYCH 250 Study Guide - Midterm Guide: Lean Body Mass, Colorectal Cancer, Bone Fracture
Document Summary
Vision: accommodation of the eye (ability to focus and maintain an image on the retina) experiences a sharp decline between ages 40 and 59. Results from weakening of muscle and growth in size of lens. Leads to difficulty viewing objects that are close: size of pupil shrinks and lens yellows, limits ability to see in dim light, limits color discrimination, reduced blood supply may decrease size of visual field and increase blind spots. Hearing: an estimated 14% of american adults between 45-64 have a hearing loss, hereditary and age related declines, decline typically starts with a loss at high frequencies, men s hearing declines earlier and at a faster rate than women. Skin: as we age, the epidermis becomes less firmly attached to the dermis, fibers in the dermis thing, and fat in the hypodermis diminishes, leading the skin to wrinkle and loosen. Skin begins to sag, age spots increase, and blood vessels become more visible.
