Ageing changes the way the eye receives, focuses and processes light, even in people who retain good functional vision. A lighting arrangement that feels comfortable to a younger worker may therefore create difficulty for an older person through glare, poor contrast, slow adaptation or insufficient local control.
As the eye ages, the pupil generally becomes smaller and admits less light. The crystalline lens also becomes denser and more yellow, reducing the transmission of shorter wavelengths and altering colour discrimination. These changes occur gradually and are part of normal ageing rather than evidence of disease.
Intraocular scatter also tends to increase. Light is spread within the eye rather than being focused cleanly on the retina, which can create veiling glare and reduce the apparent contrast of objects. A bright source that is merely distracting to one person may make nearby detail much harder to see for another.
Accommodation, the eye's ability to change focus between near and distant objects, becomes more limited with age. This is why close work may require corrective lenses and why changes in viewing distance can become more demanding. The result is not simply a need for more light, but a greater dependence on clear detail, stable contrast and suitable task positioning.
Dark adaptation and recovery from bright light also become slower. Moving from a sunlit exterior into a darker lobby, stairwell or work area can therefore leave an older person temporarily unable to see hazards that are visible to others.
Reduced light transmission through the eye means that visual tasks may require a more supportive lighting environment. Fine print, low-contrast controls, small markings and surface defects can become more difficult to distinguish, particularly where the light is uneven or comes from an uncomfortable direction.
Glare sensitivity often increases because scattered light reduces the contrast of the retinal image. Simply increasing general brightness can therefore make conditions worse if luminaires, windows or reflections become more prominent in the field of view. A successful scheme balances visibility with control of bright sources.
Contrast becomes especially important. Steps, handrails, door edges, switches, equipment controls and changes in level should be distinguishable from their surroundings. Colour alone may not provide enough separation where the colours have similar lightness, particularly when lens yellowing has altered colour perception.
Older workers may also need more time to inspect detail and adjust between different viewing distances. Lighting should support the task without requiring repeated visual adaptation, awkward posture or movement closer to a hazard. Detailed requirements for specific work activities belong to the task-lighting and inspection-task pages.
More light can improve visibility when a task is genuinely underlit, but quantity alone does not determine visual comfort. If the additional light creates reflections, harsh shadows or bright luminaires within the field of view, it may reduce rather than improve useful vision.
Direction matters because light must reveal the detail that the task depends on. Grazing light can make surface texture or defects easier to see, while diffuse light can reduce harsh shadowing. The appropriate balance depends on whether the worker is reading, assembling, inspecting, navigating or monitoring a display.
Distribution matters as well. A very bright local area surrounded by a dim room can create repeated adaptation demands whenever the worker looks away from the task. A bright corridor leading into a dark room can have a similar effect. The eye performs better when transitions are controlled and major differences are not introduced without purpose.
The most proportionate response is often a combination of suitable general lighting, local task lighting, glare control, clear contrast and individual adjustment. This approach allows the worker to obtain additional light where it is needed without raising brightness throughout the entire space.
Visual adaptation is particularly important at thresholds between bright and dark environments. In the UAE, the difference between intense exterior daylight and an enclosed interior can be substantial, especially around entrances, loading areas, covered walkways and basement access points.
An older person entering from bright sunlight may need longer before darker interior features become visible. Stairs, mats, low obstacles, glass doors and changes in level can be difficult to detect during this period. Transitional spaces can reduce the abruptness of the change by providing intermediate lighting and clear visual cues.
The reverse transition also matters. Leaving a dim interior into strong daylight can cause discomfort and temporary loss of detail until the eye adapts. Highly reflective paving, glazing and vehicle surfaces may intensify the effect. Entrance design should therefore consider both directions of travel.
Stairs require particular care because safe movement depends on the visibility of tread edges, risers, landings and handrails. Strong shadows can conceal depth, while glossy finishes can create reflections that obscure edges. Lighting, surface contrast and material selection should work together rather than being treated as separate matters.
Local task lighting can provide additional illumination exactly where it is needed for reading, inspection, assembly or other close work. It is often more effective than increasing the output of the whole room because it can be directed, adjusted and switched according to the individual and the task.
Control should be simple and accessible. A worker should be able to change the position or output of a task light without creating glare for nearby colleagues or reflections on screens and glossy surfaces. Adjustable arms, shielding and stable mounting can help keep the source out of the direct line of sight.
Individual control is valuable because age alone does not predict visual need. Corrective lenses, task complexity, fatigue, prior light exposure and eye health all influence comfort. Two workers of the same age may prefer different conditions, and a fixed scheme designed around an assumed average can serve neither particularly well.
Control also supports changing tasks. A person may need stronger local lighting for a short inspection but less for screen work or conversation. Flexibility allows the environment to respond without turning every temporary requirement into a permanent increase in background brightness.
Common eye conditions become more prevalent with age, including cataract, glaucoma, diabetic eye disease and age-related macular degeneration. These conditions affect vision in different ways and should not be inferred from a person's age or from a lighting complaint alone.
Persistent difficulty with glare, focus, colour discrimination, night vision or adaptation may indicate a need for professional assessment. A worker experiencing symptoms should be directed to occupational health, an optometrist or an appropriate medical professional rather than relying on changes to workplace lighting as a substitute for examination.
Inclusive lighting design aims to reduce unnecessary visual barriers for the widest practical range of occupants. Clear contrast, controlled glare, legible signs, visible stair edges, understandable controls and gradual transitions assist older workers but also help visitors, people with temporary visual difficulty and anyone moving through an unfamiliar space.
The result is not a separate scheme for older people. It is a workplace in which important information remains visible, visual tasks can be adjusted and avoidable sources of discomfort are controlled. Ageing eyes make these design principles more important, but the benefits are shared across the workforce.
In the Emirate of Abu Dhabi, workplace lighting is a mandatory matter. The Abu Dhabi Public Health Centre states that Codes of Practice under the ADOSH-SF framework are mandatory to all entities regardless of risk classification, and ADOSH-SF Code of Practice 8.0, General Workplace Amenities, Version 4.0, effective 15 July 2024, applies to all employers within the Emirate of Abu Dhabi. Its Section 3.8 sets minimum illumination intensities of 30, 10 and 5 foot-candles according to area type, which the Code itself converts at approximately 10.764 lux to the foot-candle. ADPHC's Technical Guideline on ergonomics in an office environment adds recommendations for office and screen work and is classified as non-mandatory. At federal level, MOHRE Administrative Decision No. 19 of 2023, Article 4(c), places lighting duties on employers within MOHRE's jurisdiction, including a requirement for emergency lighting when the primary system fails. EN 12464-1 and ISO/CIE 8995-1 are consensus standards: widely used and often specified contractually, but not statutory in the UAE unless an instrument adopts them. A requirement binding only in the Emirate of Abu Dhabi is not UAE law and must not be described as such.
ADOSH-SF Code of Practice 8.0 — General Workplace Amenities, V4.0 (15 July 2024), Section 3.8; MOHRE Administrative Decision No. 19 of 2023, Article 4(c)
Not always. Older eyes often receive less light and may need stronger support for fine or low-contrast tasks, but glare, direction, contrast and adaptation are equally important. Adding brightness without controlling these factors may reduce comfort and visibility.
Age-related changes increase the amount of light scattered inside the eye. This scattered light can wash over the retinal image and reduce contrast, making detail near a bright source harder to see.
Older eyes generally adapt more slowly after a major change in brightness. During the adjustment period, stairs, obstacles and changes in level may be difficult to detect, particularly when moving from strong UAE daylight into a darker interior.
No. Task lighting can improve local visibility, but it cannot correct poor contrast, direct glare, unsuitable screen reflections or abrupt changes between bright and dark areas. It should form part of a wider lighting arrangement.
Age can indicate that certain visual changes are more likely, but it should not be used as a precise design formula. The better approach is to provide an adaptable environment with clear contrast, glare control and individual task-lighting options.
Persistent changes in vision, repeated difficulty with glare or adaptation, or problems that are not resolved by ordinary workplace adjustments should be referred to occupational health, an optometrist or an appropriate medical professional.