Falls Prevention Awareness Week: How your vision affects your balance
An optometrist’s guide for Falls Prevention Awareness Week 2026 (21–25 September)
How your vision affects your balance and causes falls
When taking a steady step down a flight of stairs or navigating an uneven pavement, your brain relies on a complex tripartite control system to keep you upright. This balance mechanism draws input from three primary sources:
- The vestibular system (your inner ear)
- Proprioception (sensory feedback from your joints and muscles)
- The visual system (your eyes and optical pathways)
While inner ear infections or muscular weakness are widely recognised causes of instability, vision is often the dominant sensor in maintaining spatial posture. Research indicates that visual input accounts for up to 80% of the information your brain uses to determine posture and spatial orientation. When your visual clarity, depth perception, or peripheral field becomes compromised, your risk of misjudging obstacles and suffering a trip or fall increases dramatically.
For Falls Prevention Awareness Week 2026 (21–25 September), we are taking a closer look at the intricate connection between sight and stability, exploring how visual changes affect different age groups, and explaining how routine eye care can protect you and your family.
The science
How sight keeps you upright
Your eyes do far more than simply help you read text or recognise faces; they continually map your surroundings to provide real-time spatial positioning for your brain. Vision contributes to posture and movement through four critical channels:
- Depth perception (stereopsis): Allows your brain to judge distances accurately, such as the height of a kerb or the depth of a step.
- Contrast sensitivity: Enables you to distinguish subtle differences between light and shade, helping you identify threshold strips, dark rugs, or wet patches on a path.
- Visual field & peripheral vision: Acts as an early warning system for low-lying obstacles, furniture corners, or approaching hazards outside your direct line of sight.
- Visual motion detection: Informs your brain whether you are moving relative to your environment or if objects around you are moving, maintaining spatial stability.
If any of these visual functions are impaired - or if the visual signal reaching the brain is blurred or conflicting - your balance reactions slow down, forcing your motor system to compensate blindly.
Vision and balance across different age groups
Falls are often misconstrued as a problem that only impacts senior citizens. However, visual control of balance evolves throughout life, presenting distinct challenges and fall risks across every age bracket.
Children and teenagers: building spatial awareness
In childhood, the visual and motor systems are constantly learning to collaborate. Children rely heavily on vision to map their motor responses because their proprioceptive feedback is still maturing.
Unidentified refractive errors - such as hyperopia (long-sightedness), astigmatism, or anisometropia (a significant difference in prescription between the two eyes) - can severely disrupt binocular vision and depth perception. Furthermore, conditions like amblyopia ("lazy eye") or subtle eye alignment issues (strabismus/phoria) mean a child's brain receives mismatched images, making accurate spatial judgment difficult.
Real-world example:
An eight-year-old with undiagnosed anisometropia struggles to judge depth properly on the school playground. When running to catch a ball or stepping off climbing equipment, they consistently misread heights, leading to frequent clumsiness, sprained ankles, or sudden trips over low garden borders or playground equipment.
Working-age adults: subtle prescription shifts and fast-paced activity
In adults aged 20 to 50, gradual changes in eyesight often go unnoticed because the brain naturally attempts to compensate for minor blur. However, even slight, uncorrected changes in astigmatism or distance vision can subtly alter depth perception and spatial awareness - particularly during movement or low-light conditions.
Modern lifestyle factors, such as prolonged digital screen use, also cause eye strain and dry eyes, leading to temporary vision fluctuations. When combined with active lifestyles, gym workouts, or sports, these minor visual discrepancies can compromise foot-eye coordination and lead to sudden trips or missteps.
Real-world example:
A 38-year-old active adult with a slight, uncorrected astigmatism goes for an evening jog along a poorly lit park path. Because their eyes cannot sharply distinguish depth and texture in low light, they misjudge the height of an exposed tree root across the trail, leading to a sudden stumble and a twisted ankle.
Older adults: structural eye changes and fall prevention
From age 60 onwards, age-related ocular conditions become substantially more prevalent, alongside a natural decline in contrast sensitivity and dark adaptation. Diseases such as age-related macular degeneration (AMD), cataracts, and glaucoma specifically target key visual functions required for balance:
- Cataracts: Cloud the natural lens, creating glare sensitivity and heavily reducing contrast - making grey paving stones, kerbs, and carpet edges blend together.
- Glaucoma: Silently erodes peripheral vision, reducing awareness of obstacles located at foot level or to the sides.
- Macular Degeneration: Destroys central vision, forcing reliance on peripheral vision which lacks the clarity required for precision foot placement.
Real-world example:
A 74-year-old with early-stage cataracts and mild glaucoma is walking in their garden at dusk. Due to diminished contrast sensitivity and restricted peripheral vision, they fail to spot a slight rise in the lawn where a paving slab sits. Unable to visually differentiate the grey slab from the surrounding grass in low light, they catch their toe and fall forward.
How outdated or incorrect glasses increase fall risks
It is not only underlying eye diseases that can disrupt balance; wearing the incorrect spectacles can also present a significant falling hazard in daily life. When a prescription is outdated, even subtle uncorrected changes in vision degrade overall image sharpness. This reduction in clarity forces the brain to process visual information more slowly, delaying your body’s automatic balance reactions and foot placement when navigating unexpected hazards.
Similarly, the physical fit of your glasses plays a critical role in spatial stability. If your frames frequently slide down your nose, the optical centres of the lenses shift away from the center of your pupils. This displacement creates unwanted prism effects, inducing a sensation of visual "swimming" or distorted spatial perception that makes ground height difficult to gauge accurately.
Simple steps to protect your sight and stability
Preventing vision-related falls is a simple and proactive process that starts with regular professional care. Having a thorough eye examination at least every two years - or annually for those living with diabetes - ensures any subtle prescription changes or early eye conditions are caught promptly. If you wear varifocals or bifocals and occasionally feel uncoordinated while walking outdoors, it is always worth discussing this with your optometrist. A dedicated pair of single-vision distance glasses tailored specifically for outdoor activities can dramatically improve ground clarity and spatial confidence. Additionally, keeping your glasses professionally fitted prevents frames from sliding down your nose and altering your optical alignment; popping in to see us for a quick frame adjustment makes a world of difference!
Making a few thoughtful adjustments to your living environment can further support your stability. Optimising home lighting is crucial: keeping hallways, staircases, and bedside areas brightly lit reduces the strain on your eyes, while plug-in nightlights offer safe guidance during nighttime trips. Enhancing visual contrast throughout the home also helps your brain instantly map spatial boundaries. Using contrasting colours for stair nosing, doorframes, and rug borders ensures these potential trip hazards are easily distinguishable at a glance.
