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OverviewAetiologyPathophysiologyClinical features and red flagsInvestigationsDifferential diagnosisManagementComplicationsMonitoring and follow-upSpecial situationsCommon pitfallsQuestionsSources
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Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.

Hearing and visual impairment

Medicine of older adults · UK scope · Sources checked 27 Aug 2026 · Clinical review pending

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Sudden sensory loss

Sudden sensorineural hearing loss, acute monocular or binocular visual loss, painful red eye, retinal detachment symptoms, new neurological signs or giant-cell-arteritis features can cause permanent disability without urgent treatment.

Action: Establish exact onset and laterality, examine ear, eye and neurology without delaying referral, and arrange immediate ENT, ophthalmology, stroke or giant-cell-arteritis pathways according to the syndrome; do not attribute abrupt loss to wax or ageing without confirmation.

Overview

Identify reversible and time-critical sensory loss, assess how hearing and vision affect cognition, communication, falls and medicines, and connect treatment, rehabilitation, environmental adaptation and community follow-up without attributing impairment to age.

Ask onset in hours, days or years; one or both sides; pain, discharge, tinnitus, vertigo, flashes, floaters, field loss, distortion, glare and neurological symptoms. Document real function: conversation, telephone, television, reading, faces, cooking, medicines, mobility, driving and alarms. Obtain collateral without speaking over the person. A change noticed after losing an aid may be access failure rather than new organ disease.

For hearing, inspect pinna, canal and tympanic membrane before assuming wax. Use Weber and Rinne tests when trained, but arrange pure-tone audiometry and speech or functional assessment for persistent loss. Review noise, infections, surgery and ototoxic medicines such as aminoglycosides and selected chemotherapy. Sudden sensorineural loss is time critical even when the ear canal contains incidental wax.

Practice

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Medicine of older adultsOriginal SBA

Sudden hearing loss

A 74-year-old wakes with severe unilateral hearing loss that began that morning. Otoscopy shows no wax or middle-ear cause. What is the correct action?

Choose one answer, then submit
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Sources and review status5 sources · checked 27 Aug 2026 · clinical review pending+
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Apply principles in context and verify current guidance when a decision affects care. Source check completed 27 Aug 2026; clinical approval remains outstanding.

  • NICE NG98 hearing loss in adultsSudden-loss referral, assessment, hearing aids and follow-up.
  • NICE NG77 cataracts in adultsFunction-based referral, surgery and postoperative care.
  • NICE NG81 glaucomaCase finding, diagnosis, monitoring and treatment pathways.
  • NICE NG97 dementia recommendationsSensory impairment, communication and valid cognitive assessment.
  • DVLA visual disorders guidanceCurrent visual standards and condition-specific driving rules.

Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes

Authoring stateComplete draftClinical stateAwaiting reviewJurisdictionUnited Kingdom
NICE defines immediate referral for sudden hearing loss that developed over three days or less within the previous 30 days when external and middle-ear causes do not explain it. Sudden loss more than 30 days ago still needs urgent specialist assessment, and rapid worsening over four to 90 days also warrants urgent referral. Unilateral loss, tinnitus or facial and neurological signs changes imaging urgency.

For vision, test each eye separately with usual correction for distance and near tasks. Examine pupils for afferent defect, eye movements, visual fields, red reflex and anterior eye, adding fundoscopy and intraocular pressure where competent and indicated. A normal bedside field or direct ophthalmoscopy does not exclude retinal tear, macular disease or glaucoma.

Identify visual emergencies by phenotype. Sudden painless monocular loss may be retinal artery occlusion, detachment or ischaemic optic neuropathy. Flashes, new floaters and a curtain suggest retinal tear or detachment. Painful red eye with haloes and nausea suggests angle closure. Jaw claudication, scalp tenderness and visual disturbance suggests giant cell arteritis; treatment must not wait for outpatient confirmation.

Treat reversible conductive causes safely. Wax management depends on perforation, surgery, infection, anticoagulation, canal anatomy and patient ability; use local evidence-based irrigation, microsuction or softener pathways rather than blind instrumentation. Otitis and perforation require appropriate ear treatment. Persistent loss after clearance proceeds to audiology.

NICE recommends hearing aids when hearing loss affects communication. Offer two aids for aidable bilateral loss because bilateral input improves speech localisation and sound quality. Fit, verification and follow-up matter: teach insertion, cleaning, batteries or charging, phone and loop use. Check whether arthritis, vision, tremor, cognition or care routines prevent operation and involve audiology and carers with consent.

Visual treatment follows the cause. Update refraction and lighting; refer cataract when it impairs quality of life and discuss surgery without a rigid acuity threshold. Macular and diabetic retinal disease need ophthalmic monitoring and treatment; glaucoma requires pressure and field care. Low-vision services provide magnification, lighting, contrast and rehabilitation even when disease treatment continues.

Modify communication before testing cognition or capacity. Gain attention, reduce background noise, face the person in good light, speak clearly at normal pace, use short written or large-print information and confirm understanding. Do not shout, exaggerate lip movements or assume agreement from nodding. Book a qualified interpreter for language needs; a hearing impairment is not solved by a family translator.

Integrate falls and medicines. Restore aids, review bifocal or multifocal use during stairs where relevant, optimise lighting and contrast, remove hazards and assess vestibular and neurological contributors. Review sedatives and ototoxic exposure without stopping essential treatment unsafely. OT and sensory services assess talking dispensers, tactile markers, alarms and home navigation.

Driving requires the statutory visual standard and condition-specific DVLA guidance; bedside reassurance is insufficient when fields or acuity are uncertain. Plan transport if driving stops. At every transition communicate aid type, batteries, glasses, ear and eye diagnoses, follow-up and preferred communication method so sensory access is not lost between settings.

Key points

  • Hearing and sight loss are not diagnoses of normal ageing; establish onset, laterality, progression, fluctuation, functional impact and red flags.
  • First-line hearing assessment includes otoscopy, medication and noise history, communication needs and audiology; tuning forks can help separate conductive from sensorineural loss.
  • NICE requires immediate 24-hour specialist assessment for sudden hearing loss over three days or less within 30 days when not explained by outer or middle-ear disease.
  • First-line visual assessment records corrected distance and near acuity, pupils, fields, eye movements, red reflex and symptom-directed retinal and pressure evaluation.
  • Sudden visual loss, flashes with a curtain, painful red eye or giant-cell-arteritis features requires same-day or immediate specialist action.
  • Always provide clean working glasses and hearing aids, batteries and communication adaptations during hospital or care transitions.
  • Hearing aids should be offered for hearing loss affecting communication, with bilateral aids when both ears have aidable loss and the person accepts them.
  • Cataract referral follows functional impairment and shared surgical benefit rather than denying surgery from visual-acuity thresholds alone.
  • Home adaptation includes lighting, contrast, large print, talking labels, visual or vibrating alarms, captioning, telephone aids and falls-safe layout.
  • Assess cognition and capacity only after maximising communication; sensory impairment can invalidate a rushed interview or cognitive score.

Aetiology

01

Conductive hearing loss

Wax, otitis externa, middle-ear fluid, perforation and ossicular disease reduce sound transmission before the cochlea receives an adequate signal.

02

Sensorineural hearing loss

Cochlear ageing, noise, ototoxic exposure, infection and neural disease impair hair-cell or auditory-nerve function and speech clarity.

03

Ocular media and retinal disease

Refractive error, cataract, macular degeneration, diabetic retinopathy and retinal detachment reduce visual input through different structures.

04

Optic nerve and cerebral disease

Glaucoma, ischaemic optic neuropathy, inflammation, stroke and neurodegeneration affect fields, acuity, contrast or visual interpretation through different pathways.

Pathophysiology

  1. 1
    Reduced signal fidelity

    Loss of frequency, contrast, field or acuity reduces the information available for speech understanding, navigation and hazard detection.

  2. 2
    Increased cognitive load

    The brain devotes more attention to decoding degraded input, leaving fewer resources for memory, balance and complex conversation.

  3. 3
    Multisensory balance failure

    Vision and hearing support orientation and environmental warning; combined loss magnifies falls when vestibular or proprioceptive reserve is limited.

  4. 4
    Deprivation and participation

    Reduced communication and activity cause isolation, low mood and apparent cognitive decline, which can further reduce aid use.

  5. 5
    Treatment-access mismatch

    Poor dexterity, cognition, batteries, cleaning, lighting and transport can make technically effective aids unusable without support.

Clinical features and red flags

Conductive hearing pattern

Occlusion or middle-ear disease reduces air transmission and produces a supportive otoscopic and tuning-fork pattern.

Sensorineural hearing pattern

Inner-ear or neural loss reduces clarity, especially in background noise, without an obstructing canal lesion.

Sudden hearing emergencyRed flag

Rapid unexplained unilateral or bilateral hearing loss requires urgent ENT assessment even when pain is absent.

Central visual loss pattern

Distortion or missing central detail suggests macular disease, whereas peripheral field loss can remain unnoticed until advanced.

Retinal or angle-closure emergencyRed flag

Curtain and flashes or painful red eye with haloes and nausea requires immediate eye assessment.

Dual sensory impairment

Combined hearing and vision loss magnifies communication, navigation and cognition difficulties beyond either impairment alone.

Red flags requiring action

  • Sudden hearing loss developing over three days or less within the past 30 days, without an external or middle-ear cause, requires immediate ENT assessment within 24 hours.
  • Sudden painless monocular loss, curtain, flashes and new floaters requires same-day retinal or vascular assessment.
  • Painful red eye with reduced vision, haloes, headache, nausea or a fixed mid-dilated pupil suggests acute angle closure.
  • New visual loss, diplopia or hearing change with focal weakness, ataxia or severe headache requires acute neurological assessment.
  • Jaw claudication, scalp tenderness or polymyalgic symptoms with visual disturbance suggests giant cell arteritis and requires immediate treatment and referral.
  • Unilateral hearing loss, persistent unilateral tinnitus, facial weakness or asymmetric neurological signs requires expedited specialist investigation.

Investigations

  1. 01
    Otoscopy and tuning-fork assessmentFirst step
    Why
    Identify conductive disease before referral.
    Interpretation and limitations
    Wax, canal inflammation, perforation or effusion can explain transmission loss; tuning forks support but do not replace audiometry.
  2. 02
    Pure-tone and functional audiology
    Why
    Quantify hearing thresholds and communication impact.
    Interpretation and limitations
    Interpret air-bone gaps, asymmetry and speech needs with history; asymmetry or neurological signs may require specialist imaging.
  3. 03
    Corrected visual acuity
    Why
    Measure distance and near function in each eye.
    Interpretation and limitations
    Test with usual correction and pinhole where appropriate; acuity alone does not assess field, contrast or retinal emergency.
  4. 04
    Pupils, fields and eye examination
    Why
    Localise optic, retinal, ocular and neurological disease.
    Interpretation and limitations
    Afferent defect, field pattern, red reflex, pressure or fundus findings direct urgent ophthalmic or neurological testing.
  5. 05
    Specialist retinal or optic imaging
    Why
    Confirm macular, retinal, glaucoma and optic-nerve pathology.
    Interpretation and limitations
    OCT, formal fields, fundus imaging and angiographic or neuroimaging tests answer condition-specific questions after referral.
  6. 06
    Medication and exposure review
    Why
    Identify ototoxic, ocular and sedative contributors.
    Interpretation and limitations
    Relate aminoglycoside, chemotherapy, steroid, anticholinergic and sedative exposure to timing, dose, organ function and alternative causes.
  7. 07
    Communication and functional assessment
    Why
    Measure the effect on safety and independence.
    Interpretation and limitations
    Assess medicine use, calls, alarms, reading, meals, mobility, driving, cognition and ability to operate aids in the real environment.

Differential diagnosis

01

Wax or middle-ear disease

Otoscopy and tuning-fork pattern distinguish conductive obstruction from inner-ear or neural loss requiring audiology and possible specialist review.

02

Presbycusis or ototoxicity

Gradual bilateral high-frequency loss differs from sudden or asymmetric change; medicine and noise history refine the cause.

03

Cataract or refractive error

Gradual blur, glare and reduced contrast may improve with refraction or surgery after retinal and optic disease assessment.

04

Macular, retinal or glaucoma disease

Central distortion, flashes and curtain, or progressive field loss require different retinal and optic-nerve investigation and treatment pathways.

05

Delirium or cognitive impairment

Sensory loss can mimic inattention and misunderstanding, while acute brain dysfunction can also reduce test reliability and aid use.

Management

01First-line sensory assessmentDefine organ, onset and functional effectFirst stepFirst lineHearing, vision or communication has changed.+
  1. 1Establish onset, laterality, associated ear, eye and neurological symptoms and urgent red flags.
  2. 2Perform otoscopy or corrected visual and focused examination and review medicines, aids and functional consequences.
  3. 3Treat a reversible cause or refer to audiology, ENT, optometry or ophthalmology with urgency matched to the syndrome.
02Sudden-loss routeProtect remaining sensory functionHearing or vision falls abruptly or an acute eye-pain syndrome occurs.+
  1. 1Document exact onset and perform focused ear, eye, vascular and neurological assessment without delaying specialist contact.
  2. 2Arrange immediate ENT within 24 hours for qualifying sudden hearing loss, or same-day ophthalmic, stroke or giant-cell-arteritis treatment as indicated.
  3. 3Provide interim communication, mobility and driving safety and communicate follow-up responsibility explicitly.
03Rehabilitation and aidsTurn amplification and vision support into participationPersistent loss affects communication, reading, mobility or medicine use.+
  1. 1Offer appropriate hearing aids, refraction, cataract or disease treatment and low-vision or sensory-service assessment.
  2. 2Fit and teach aids and adapt batteries, cleaning, lighting, contrast, captioning, labels, alarms and telephone access.
  3. 3Review actual use, comfort, communication, falls and valued activity and correct practical barriers rather than declaring non-adherence.
04Cognition and transition routeMake communication valid across settingsSensory loss complicates delirium, capacity, consent or a care transition.+
  1. 1Restore working aids, reduce noise, improve lighting and use accessible information before cognitive or decision assessment.
  2. 2PreferredRecord the preferred communication method, capacity supports, aid details and assistance required in the care plan.
  3. 3Ensure batteries, cleaning, appointments, transport and community sensory support continue after discharge.

Complications

01

Falls and injury

Reduced contrast, depth, field and environmental awareness impairs obstacle detection, gait adaptation and traffic safety in unfamiliar environments.

02

Delirium and diagnostic error

Missing glasses or hearing aids worsens orientation and can make comprehension failure look like confusion or incapacity.

03

Isolation and depression

Conversation, reading, driving and community activity contract, causing loneliness, low mood and dependence on others for ordinary participation.

04

Medication and consent error

Unheard instructions and unread labels cause wrong dosing, missed monitoring and invalid assumptions about informed agreement.

05

Driving and safeguarding risk

Visual-standard failure, missed alarms and inaccessible communication can endanger the person and others and increase vulnerability to neglect or exploitation.

Monitoring and follow-up

  • Repeat audiology or eye measurements at the disease-specific interval and sooner for rapid change or new asymmetry.
  • Check hearing-aid fit, comfort, wax, batteries, cleaning and actual daily use after fitting.
  • Review glasses, lighting, magnification, field and contrast needs as vision or function changes.
  • Track falls, navigation, medicine errors, communication, social participation, mood and delirium episodes.
  • Reassess cognition and capacity when sensory access improves rather than relying on a compromised baseline score.
  • Review ototoxic or ocular-risk medicines with organ function and specialist monitoring when exposure continues.
  • Confirm ENT, audiology, optometry, ophthalmology and low-vision follow-up survives every care transition.

Special situations

Wax can coexist with urgency

An incidental blockage should not delay sudden sensorineural hearing-loss referral when the history remains concerning.

Acuity misses much function

Contrast, glare, fields and adaptation determine mobility even when a chart score seems relatively preserved.

Aids require a service

Fitting, verification, cleaning, batteries and follow-up determine whether the device restores participation.

Sensory loss can mimic cognition

Poor test access causes wrong answers, apparent inattention and false assumptions about capacity or dementia.

Two losses multiply

Hearing cannot compensate for vision and vision cannot support lip reading when both senses are impaired.

Common pitfalls

  1. 01

    Attributing abrupt hearing or visual loss to normal ageing.

  2. 02

    Delaying sudden hearing-loss referral while repeatedly treating presumed wax.

  3. 03

    Using visual acuity alone to exclude retinal, field or glaucoma disease.

  4. 04

    Performing cognition or capacity testing without working aids and accessible communication.

  5. 05

    Issuing a hearing aid without checking dexterity, batteries, cleaning and follow-up.

  6. 06

    Refusing cataract referral solely because a visual-acuity threshold is not met.

  7. 07

    Stopping an essential medicine labelled ototoxic without indication and specialist risk review.

  8. 08

    Discharging without glasses, hearing aids or the plan for replacing them.