Touhy Chapter 11: Vision Touhy Chapter
12: Hearing
Arcus senilis correct answers a half-circle of gray, white, or yellow deposits in the outer
edge of the cornea. Made of fat and cholesterol deposits. In older adults, arcus senilis is
common and is usually caused by aging.
Ectropion correct answers The eyelid turns outward. This leaves the inner eyelid
surface exposed and prone to irritation.
Entropion correct answers Eyelid (usually the lower lid) folds inward. It is very
uncomfortable, as the eyelashes continuously rub against the cornea causing irritation.
Vison correct answers All age-related vision changes affect visual acuity (clarity) and
accommodation (ability to focus near & far)
Dry eye syndrome (DES) correct answers •not a disease, but a frequent complaint of
Oas
•Causes: Age, medications & diseases
•Home care: humidifier, avoid wind/hair dryers, Vitamin A
•TX: moisturizing eye drops, surgery if needed.
•Cornea flattens, thickens, less smooth - astigmatism - misshaped cornea or lens
Presbyopia correct answers ↓d near vision; starts ~ age 45-55
color vision changes correct answers •less accurate w/ blues, violets & greens. Color
clarity ↓s
Anterior chamber correct answers •↓s in size - decreased fluid movement lead to
glaucoma
Retina changes correct answers •Less blood to retina, ↓ vitreous humor lead to
increased risk for retinal detachment
depth and perception correct answers can decrease especially with persons who wear
bi-focal or tri-focal lenses
Increased opacity of lenses correct answers cataracts
capillary muscles correct answers •↓d diameter atrophy of muscles - persistent
constriction
95% of adults > 65 wear glasses for near vision
12: Hearing
Arcus senilis correct answers a half-circle of gray, white, or yellow deposits in the outer
edge of the cornea. Made of fat and cholesterol deposits. In older adults, arcus senilis is
common and is usually caused by aging.
Ectropion correct answers The eyelid turns outward. This leaves the inner eyelid
surface exposed and prone to irritation.
Entropion correct answers Eyelid (usually the lower lid) folds inward. It is very
uncomfortable, as the eyelashes continuously rub against the cornea causing irritation.
Vison correct answers All age-related vision changes affect visual acuity (clarity) and
accommodation (ability to focus near & far)
Dry eye syndrome (DES) correct answers •not a disease, but a frequent complaint of
Oas
•Causes: Age, medications & diseases
•Home care: humidifier, avoid wind/hair dryers, Vitamin A
•TX: moisturizing eye drops, surgery if needed.
•Cornea flattens, thickens, less smooth - astigmatism - misshaped cornea or lens
Presbyopia correct answers ↓d near vision; starts ~ age 45-55
color vision changes correct answers •less accurate w/ blues, violets & greens. Color
clarity ↓s
Anterior chamber correct answers •↓s in size - decreased fluid movement lead to
glaucoma
Retina changes correct answers •Less blood to retina, ↓ vitreous humor lead to
increased risk for retinal detachment
depth and perception correct answers can decrease especially with persons who wear
bi-focal or tri-focal lenses
Increased opacity of lenses correct answers cataracts
capillary muscles correct answers •↓d diameter atrophy of muscles - persistent
constriction
95% of adults > 65 wear glasses for near vision
