Rehabilitation of an older adult with low vision

Low vision is visual impairment that cannot be corrected by spectacles, contact lenses, medical treatment or surgery, but where useful residual vision remains — irreversible vision loss with retained function, distinct from total blindness.

Vision rehabilitation enables a person with irreversible low vision to maximise use of residual vision, learn compensatory skills, adapt the environment, and continue participating in daily and social life. The goal is function and quality of life, not visual acuity.

First rule: exclude and treat every reversible cause. In India, around 93% of blindness and 97% of visual impairment in people aged ≥50 years is avoidable — chiefly untreated cataract and uncorrected refractive error. Low vision rehabilitation is never a substitute for cataract surgery or a pair of spectacles.

As many as 75% of older adults have significant visual or auditory dysfunction that they never report to their physician — hence active screening is essential. These impairments limit functional activity and lead to social isolation and depression, and correcting remediable conditions improves the ability to perform daily activities.

Indian data: In the National Blindness and Visual Impairment Survey (RAAB, 2015– 19), among those aged ≥50 years, blindness prevalence was 1.99% and more than one-quarter were visually impaired. Causes of blindness: cataract 66.2%, corneal opacity 8.2%, cataract surgical complications 7.2%, posterior segment disease 5.9%, glaucoma 5.5%. LASI wave-1 found impaired vision in 13.7% of Indians aged ≥60.

Normal ageing changes: reduced visual acuity (choroid, pigment epithelium, retina, rod/ cone function); difficulty gazing upward and sustaining convergence; rising intraocular pressure; presbyopia from nuclear sclerosis and ciliary muscle atrophy; increased hyperopia or myopia; reduced tear secretion (dry eye); corneal endothelial degeneration. Condition Functional deficit Rehabilitation implication Cataract Glare intolerance, gradual Mostly reversible — surgery when it interferes acuity loss with activities; interim: optimum eyeglasses, UV lenses, glare control Open-angle Peripheral field loss first, Mobility and falls training are the priority; glaucoma central acuity preserved long magnification helps little in tunnel vision Age-related Central acuity loss — Magnification and eccentric viewing macular reading, driving and training; total blindness does not occur — degeneration recognising faces peripheral vision is retained Diabetic Central loss from macular Tight glycaemic and BP control plus laser; retinopathy oedema/ischaemia; patchy allow for neuropathy and reduced tactile field loss substitution D. Consequences That Rehabilitation Must Target

Visual impairment is an established risk factor for falls and fractures, and patients who have had cataract surgery have a lower risk of hip fracture.

Depression is a predictable consequence, not an incidental one. Clinical depression occurs as a result of the fall in quality of life in AMD and should be actively treated — a core part of the rehabilitation plan.

Other consequences: loss of ADLs and IADLs (reading, cooking, medication identification, finances), loss of driving, social withdrawal, malnutrition, and increased dependency and institutionalisation risk.

Ophthalmological screening: visual acuity; lens and fundus; intraocular pressure; ophthalmoscopy; tonometry; visual fields; and the simple functional test — ability to read newspaper-sized print.

Functional assessment goes beyond acuity: near and distance acuity, contrast sensitivity, glare sensitivity, visual fields, reading ability, light and dark adaptation, and what the person can actually do at home. Tools: Lambeth Disability Screening Questionnaire and the Vision Function Questionnaire.

Assess vision as part of intrinsic capacity. Under WHO ICOPE, vision is a critical component of person-centred assessment; Step 2 assesses visual impairment and eye disease, and Step 3 interventions include reading glasses, referral for comprehensive eye and vision care, vision rehabilitation for irreversible low vision, and home adaptation to prevent falls. Treating visual impairment enables maintaining family and social relationships, accessing information, moving safely and performing manual tasks.

Always screen for coexisting hearing loss — dual sensory impairment multiplies disability, isolation and cognitive risk, and changes every rehabilitation strategy.

Optical correction pitfalls in falls prevention: routine vision screening alone did not reduce falls; assessment and treatment of vision impairment reduces falls only when coupled with an exercise programme. Replacing multifocal lenses with single-vision lenses for outdoor activity is effective, and cataract surgery reduces falls in older women — though second-eye surgery does not show the same effect.

Training and skills teaching: visual skills training (eccentric viewing, steady fixation, scanning for field loss); orientation and mobility training (long cane, sighted-guide technique, safe road and stair negotiation); ADL retraining (labelling, pouring, cooking, grooming, safe medication identification); and reading rehabilitation — prescribing a magnifier without training usually fails.

Psychological and social support: counselling, adjustment support, treatment of depression, self-help and peer groups, family education, and linkage to welfare benefits and disability certification. Address the grief reaction to lost independence and lost driving.

Review the drug chart — ophthalmic drops are systemically absorbed: Drop Systemic effects relevant to the older person β-blockers (timolol) Bradycardia, hypotension, syncope, heart failure, bronchospasm; confusion, depression, fatigue, hallucinations, memory impairment; hyperkalaemia Adrenergics Extrasystoles, palpitation, hypertension, myocardial infarction, (phenylephrine, tremor, sweating epinephrine) Cholinergics (pilocarpine) Bronchospasm, salivation, nausea, vomiting, diarrhoea, abdominal pain Anticholinergics Ataxia, restlessness, confusion, hallucinations, aggression, (atropine) insomnia, photophobia, urinary retention → Assess other illnesses and medicines, use the minimum effective dose, and monitor for systemic toxicity.

The team: ophthalmologist and optometrist, low vision therapist, occupational therapist, orientation and mobility instructor, nurse, clinical psychologist/social worker, dietician, and the family carer. Devices should be prescribed only if they improve participation in activities the person and family have identified as important.

Outcome measures: vision-specific quality of life (Impact of Vision Impairment, VFQ-25), reading speed, ADL/IADL independence, falls rate, and depression scores — not visual acuity, which by definition will not improve.

WHA78.7 (May 2025) — the landmark policy change At the 78th World Health Assembly (19–27 May 2025), Member States endorsed a landmark resolution on “Primary prevention and integrated care for sensory impairments, including vision impairment and hearing loss, across the life course.” It recognises cost-effective interventions such as cataract surgery, assistive technologies (spectacles, hearing aids, implants) and rehabilitative services, and promotes integrated systematic vision and hearing screening and early intervention within health benefit packages and health information systems. Over 2.2 billion people are affected by vision impairment and 1.5 billion by hearing loss.

WHO’s framing of vision rehabilitation WHO describes vision rehabilitation as an essential component of eye care services enabling people with irreversible low vision to maximise functional abilities, enhance quality of life and participate fully in society, and notes it is very effective for irreversible loss from diabetic retinopathy, glaucoma, trauma and AMD. Frameworks: the World Report on Vision (2019) and WHA73.4 on Integrated People-Centred Eye Care (2020). WHO has issued a Planning guide for integrated vision rehabilitation for integrating services within national health systems.

SPECS 2030 — the refractive error target Only about one-third of people with vision impairment due to refractive error have spectacles that effectively correct it. The WHA74 (2021) global target is to increase effective coverage of refractive error by 40 percentage points by 2030, supported by WHO SPECS 2030. WHO and the Universal Postal Union partnered in 2025 to improve access to eyeglasses.

What low vision rehabilitation achieves — the Cochrane position The Cochrane review of 44 studies (mostly older adults with AMD) covered psychological therapies and group programmes, methods of enhancing vision, multidisciplinary rehabilitation programmes, and balance/home-safety programmes. Key message: low vision rehabilitation does not appear to have an important impact on health-related quality of life (very low-certainty evidence), but there is low-certainty evidence that some interventions — particularly psychological therapies and methods of enhancing vision — may improve vision-related quality of life. Exam interpretation: measure the right outcome — vision-specific QOL, not generic health QOL.

Occupational therapy has the strongest single evidence base Practice guidelines conclude that strong evidence supports the role of occupational therapy for older adults with low vision, recommending: routine low vision rehabilitation for ADL and IADL impairments; multicomponent interventions for ADL/IADL performance and leisure and social participation; stand-based electronic magnification to enhance reading; visual skills training for central field impairment; and client-centred problem-solving training, with mainstream technology considered case by case.

Telerehabilitation and mood A multicentre randomised controlled trial (Bittner et al., 2024) randomised 61 patients with visual impairment to telerehabilitation or in-office magnifier training 1–4 months after receiving new magnifiers: reading ability improved significantly, and outcomes did not differ between telerehabilitation and in-office care. A 2025 systematic review and meta-analysis of low-vision rehabilitation techniques (magnifiers, telescopes, microperimeter feedback) in AMD found that low-vision rehabilitation improves depression, while improvement in reading speed was non-significant because of heterogeneity.

Falls guidance and Indian context The 2023 Cochrane review showed home fall-hazard interventions reduce falls by 26% overall and 38% in higher-risk people, while assistive devices alone and education alone do not. NICE NG249 (April 2025) recommends offering a home hazard assessment with a validated tool, considering an occupational therapist to carry it out, and referring to an ophthalmologist if visual impairment is caused by cataract. In India, the RAAB 2015–19 survey found blindness prevalence 1.99% in those ≥50, with cataract (66.2%) leading, and untreated cataract (48.0%) and uncorrected refractive error (41.5%) the major contributors to visual impairment; about 93% of blindness and 96% of visual impairment was avoidable, and more than half of avoidable causes were treatable. Rashtriya Vayoshri Yojana supplies free spectacles and other devices through ALIMCO; services run through NPCBVI alongside NPHCE.

Low vision = irreversible visual impairment with useful residual vision — rehabilitation targets function, not acuity.

Treat the treatable first — in India ~93% of blindness in those ≥50 is avoidable, mostly cataract and refractive error.

75% of older adults have unreported visual or hearing dysfunction — screen actively.

AMD → central loss (reading, faces, driving); glaucoma → peripheral loss (mobility, falls).

Total blindness does not occur in AMD — peripheral vision is retained.

Aids: magnifier, lighting intensifiers without glare, tinted glasses, night light, large print.

Eccentric viewing training is the specific technique for central scotoma.

A magnifier prescribed without training usually fails.

Visual impairment predicts falls and fractures; cataract surgery lowers hip-fracture risk.

Vision correction reduces falls only when combined with exercise and home hazard modification.

Timolol drops can cause bradycardia, heart failure, bronchospasm, confusion and depression.

Depression in AMD is expected and treatable — and rehabilitation itself improves it.

Telerehabilitation is as effective as in-office low vision training.

WHA78.7 (2025) = first WHA resolution combining vision and hearing care across the life course.