Aging, Health Conditions, and Specialized Populations
Conditions and their functional signatures
Most VRT consumers are older adults, and the dominant conditions have distinct functional signatures that should drive distinct teaching. Age-related macular degeneration destroys central vision: expect difficulty reading, recognizing faces, and managing detail, while peripheral mobility may remain intact. Glaucoma damages peripheral fields: expect scanning and detection problems, bumping, and trouble in dim light or on stairs. Diabetic retinopathy produces fluctuating, patchy loss and demands attention to diabetes self-management, accessible glucose monitoring, and foot care. Cataract causes glare and reduced contrast. Stroke may cause homonymous hemianopsia, neglect, and visual processing deficits that are not eye problems at all. Cerebral visual impairment affects interpretation of what is seen.
Also consider hearing loss - dual sensory loss is common and under-detected - plus cognitive change, delirium, depression, polypharmacy, falls, and driving cessation. Address consent and capacity, guardianship, elder mistreatment reporting, and cultural and language access. For deafblind consumers, coordinate with support service providers.
Traps
Attributing treatable depression or hearing loss to 'getting old'; teaching magnification as a universal answer for field loss; expecting a person with dementia to retain training instead of building environmental and caregiver supports; missing medications that blur vision or cause dizziness.
Worked example
A client with hemianopsia after stroke keeps missing items on the left side of the counter. Scanning training - anchor, then systematic sweep, with a visual or tactile cue - plus repositioning the workspace addresses the function. A magnifier would not.
Rule of thumb: match the technique to the field loss, and screen for the conditions you cannot fix.