Chapter 29: Sensory Function & Aging

Sensory Function & Aging differentiates between general senses—such as tactile perception, pressure, and proprioception—and special senses, which include sight, audition, gustation, olfaction, and equilibrium. A primary focus is dedicated to visual health, examining age-related structural changes like presbyopia (the loss of near-focusing ability), arcus senilis, and reduced pupillary light response. The text contrasts major ocular pathologies, including glaucoma—characterized by increased intraocular pressure and peripheral vision loss—and cataracts, which involves lens opacity necessitating surgical intervention. Detailed nursing management protocols are established for retinal disorders such as age-related macular degeneration, diabetic retinopathy, and the medical emergency of retinal detachment. For auditory health, the chapter addresses conductive hearing loss resulting from cerumen impaction and the prevalent sensorineural decline known as presbycusis, which typically affects high-frequency sound perception. The discussion on balance explores the complexities of vertigo and Meniere’s disease, emphasizing fall prevention and vestibular rehabilitation to maintain mobility. Furthermore, the material addresses the decline in taste and smell, specifically the management of xerostomia (dry mouth) to ensure adequate nutrition and safety against environmental hazards like gas leaks. Finally, it notes the reduction in tactile sensitivity, which places older adults at a higher risk for injury, particularly when complicated by peripheral vascular disease or neuropathy. By utilizing assessment techniques and promoting the use of assistive devices like low-vision aids and hearing amplifiers, healthcare providers can mitigate social isolation and promote independent living for older adults.