Vision and Hearing Checks: The Screening Adults Keep Postponing

Eye and hearing checks are the two screenings adults are most likely to defer, and they share the feature that makes deferral risky: both senses fade slowly enough that you adapt to the loss instead of noticing it. There is no morning where you wake up and discover your peripheral vision has narrowed. You simply start bumping into door frames and blaming the door frames.

I put off both for years on the grounds that I could still read and could still hear the phone. What finally changed my thinking was realising that neither test is really about whether you can read or hear today. Both are looking for conditions in progress, which is the definition of screening rather than a service check.

The eye test is not a sight test

The bit everyone pictures, reading letters off a chart, is one component of a fuller examination. The rest of it is where the preventive value sits.

An examination typically also measures eye pressure, examines the optic nerve, and looks at the retina, often with drops to widen the pupil or with a retinal photograph. Those checks are hunting for conditions that develop without symptoms. Glaucoma, cataract, age-related macular degeneration, and diabetic retinopathy are among the leading causes of vision impairment worldwide, and a substantial share of vision loss globally is preventable or treatable when caught in time ¹. That last point is what makes this screening rather than a formality: the intervention exists, and the window for it opens well before you notice anything.

Glaucoma is the clearest case. The common form damages the optic nerve gradually and takes peripheral vision first, and the brain is very good at smoothing over the gaps. By the time someone notices, sight has usually been lost that cannot be brought back. Treatment aims to protect what remains, so detection timing is the entire game.

How often, and what changes the interval

For a healthy adult with no symptoms, an examination roughly every two years is a common baseline, with intervals shortening under any of the usual conditions: increasing age, a family history of glaucoma, an existing correction that is changing, or a chronic condition affecting the eyes. Your optometrist or ophthalmologist normally sets the interval from what they find, and it is reasonable to ask why they chose it.

Diabetes is the standout exception, and it deserves its own paragraph. Diabetic retinopathy is a major cause of vision loss, and because raised blood glucose damages the small vessels of the retina quietly, most health systems run retinal screening as a scheduled programme separate from a routine sight test ². If you have been diagnosed with type 1 or type 2 diabetes, the retinal appointment is not the same appointment as choosing glasses, and skipping it is one of the higher-consequence things you can skip. If you have not been tested for diabetes recently, that thread starts at blood glucose and diabetes screening.

Sudden changes are a different pathway entirely. New flashes, a shower of floaters, a curtain across part of your vision, sudden pain, or abrupt loss of sight are urgent symptoms. Those need same-day assessment, not a booking in a fortnight.

Hearing: the slowest possible reveal

Hearing loss is common and becomes more so with age, and WHO reporting frames it as a major and growing global burden rather than a minor inconvenience of getting older ³. What makes it easy to miss is that it tends to go from the top down: high frequencies first, which are where consonants live. Speech does not get quieter so much as mushier, and it collapses first in exactly the settings people blame instead, which is why “I hear fine, restaurants are just loud now” is such a familiar sentence.

The usual first sign is other people. Someone mentions the television volume, or you find yourself watching lips more than you used to, or you have stopped enjoying group dinners without quite deciding to.

That last one is the reason this belongs in a prevention resource rather than a lifestyle one. Untreated hearing loss is associated in WHO’s reporting with communication difficulty, social withdrawal, and reduced quality of life, and its consequences reach well past the ears ⁴. Keeping older adults connected and functioning is a large part of what healthy ageing means in practice ⁵.

What the test involves

A standard hearing assessment is undramatic. You sit in a quiet room or a booth wearing headphones, and press a button whenever you hear a tone. The tones vary in pitch and get quieter until you stop hearing them, which maps the softest sound you can detect at each frequency. The result is an audiogram, a chart of thresholds across pitches, and it usually shows the high-frequency dip long before anyone would call themselves hard of hearing. Many services add a speech-in-noise element, which is closer to the situation people actually struggle with. The whole thing generally takes 20 to 30 minutes, and the examiner will also look in your ears, since something as ordinary as impacted wax can account for a chunk of the problem.

There is no universal recommendation that every adult be screened for hearing loss on a fixed schedule, and guideline bodies differ on this. What is not in dispute is that symptoms should be acted on rather than absorbed, and that anyone with occupational noise exposure should be tested on whatever schedule their workplace runs.

The prevention that beats the test

For hearing especially, the most valuable action is not a test at all. Noise-induced hearing loss is preventable, and it accumulates: loud workplaces, power tools, live music, and personal listening devices at high volume all contribute, and the damage does not undo itself ³. Ear protection at work, keeping personal audio at moderate volume, and taking breaks from loud environments are the levers. Nothing on the screening menu compensates for skipping them.

The equivalent for eyes is less tidy but real. Blood pressure and blood glucose control protect the small vessels of the retina, ultraviolet protection is sensible, and not smoking is on this list too, as it is on almost every list in preventive medicine. The broad points are in lifestyle changes that prevent disease, and the eyes are quietly one of the organs that benefit.

Putting them in the plan

Both of these are cheap, quick, non-invasive, and among the least fashionable items on any screening menu, which is roughly the profile of the checks that turn out to matter. Neither involves waiting weeks for a result. Neither generates the cascade of incidental findings that broad imaging does. If you are deciding where to spend a limited amount of attention on prevention this year, an eye examination is a stronger candidate than most of the add-ons in a premium package, a point that runs through how to build your own screening plan.

The honest reason most of us postpone them is that we assume we would notice. The whole point is that we would not.

This article is general information, not medical advice. Symptoms affecting your sight or hearing, and the right testing interval for you, are matters for a qualified clinician, optometrist, or audiologist who knows your history.