TL;DR
Glare sensitivity may seem trivial to some, but it is an issue that many face, often without understanding the root causes. A significant number of individuals experience varying degrees of glare sensitivity, especially as environmental factors and health conditions intersect.
Whether you’re squinting against a setting sun or struggling with headlights at night, knowing the causes of glare sensitivity and how to manage it can lead to a better quality of life.
What is glare sensitivity?
Glare sensitivity occurs when the eyes are excessively affected by bright light.
While it’s natural to squint or avert your eyes from extreme light, those with glare sensitivity experience a heightened discomfort, which may range from mild irritation to severe discomfort or even pain. This sensitivity can be triggered by natural sunlight, artificial light sources, or even the reflections off various surfaces.
Symptoms of glare sensitivity
Common symptoms include:
- Squinting
- Watering eyes
- Headaches
- Feeling of visual distortion.
The condition can affect people of all ages, though it is particularly noticeable in individuals who already suffer from certain eye conditions or neurological disorders.
Common causes of increased glare sensitivity
Age-related changes
As we age, our eyes undergo various changes that can increase sensitivity to glare. The lens of the eye can become cloudier due to a condition known as cataracts, which scatters light entering the eye.
It’s estimated that around 50% of people over the age of 65 in the UK will develop cataracts to some degree, leading to worsened glare sensitivity.
Dry eye syndrome
Dry eye syndrome is another prevalent condition that can heighten glare sensitivity. The eyes depend on a thin layer of tears for lubrication, and when this film is compromised, it leads to discomfort and reduced clarity of vision. This condition is more common in the elderly and those who use digital devices extensively, as prolonged screen time leads to less frequent blinking.
Refractive errors and eye surgery
Refractive errors such as nearsightedness, farsightedness, and astigmatism can all contribute to glare sensitivity. Individuals with these conditions might struggle more in bright light due to their eyes’ inability to focus light properly. Glare sensitivity is a common side effect after eye surgeries, particularly LASIK. Following the procedure, patients often report heightened sensitivity to light as the cornea heals.
Related read: LASIK Eye Surgery: Who Is It For?
Migraine and other neurological disorders
Studies suggest that nearly 80% of individuals with chronic migraines report increased sensitivity to light. It is believed that the light sensitivity stems from changes in the brain’s processing of sensory information during a migraine episode.
Conditions such as traumatic brain injury (TBI) or other neurological disorders can also make one more susceptible to glare, as the brain processes visual input differently after injury.
Medications
Certain medications can cause side effects that include increased sensitivity to light. For example, medications like diuretics, antihistamines, and some antibiotics can cause the pupils to dilate, allowing more light to enter the eye. This makes glare more uncomfortable for the individual. Drugs prescribed for conditions such as high blood pressure or anxiety might cause side effects that amplify photophobia.
Environmental factors
Exposure to bright, reflective surfaces can worsen glare sensitivity. The UK’s relatively high latitude means longer days during the summer, with sunlight reflecting off surfaces such as glass, water, and even wet pavement.
The higher the sun’s position in the sky, the greater the likelihood of glare becoming problematic, especially for those already predisposed to it. Urban areas with excessive artificial lighting—such as street lamps and headlights—can be overwhelming to sensitive eyes, especially after dark.
How to manage glare sensitivity
Managing glare sensitivity involves addressing the underlying causes and making lifestyle adjustments. While some treatments may require medical intervention, others can be handled through simple yet effective changes.
Proper eyewear
The most straightforward approach to managing glare sensitivity is through the use of protective eyewear. Sunglasses with polarised lenses can significantly reduce glare from sunlight. Polarisation works by filtering out horizontal light waves that cause glare, allowing only vertical light waves through.
Prescription glasses with an anti-reflective coating can also help by reducing the amount of light that reflects off the lenses. If you suffer from glare at night, consider wearing glasses with yellow-tinted lenses that can enhance contrast and reduce the intensity of headlights.
Managing dry eyes
For those suffering from dry eye syndrome, using artificial tears or lubricating eye drops can help provide relief from glare sensitivity. It’s crucial to take frequent breaks from digital screens. A practice called the 20-20-20 rule – looking at something 20 feet away for 20 seconds every 20 minutes – can help reduce digital eye strain and prevent exacerbation of glare issues.
Addressing underlying health issues
If your glare sensitivity is related to conditions like cataracts, migraine, or neurological disorders, seeking appropriate treatment is essential. Cataract surgery can help alleviate glare by replacing the cloudy lens with a clear, artificial one.
Managing migraines through medications, lifestyle changes, and avoiding triggers like bright lights can reduce the frequency and severity of glare. Those with neurological disorders may benefit from working with an optometrist or neurologist to find tailored solutions.
Adjusting lighting in your environment
Simple environmental changes can go a long way in managing glare sensitivity. When indoors, try using softer, warmer light sources, such as LED bulbs with a low colour temperature. Dimmer switches can also give you greater control over the intensity of light in a room.
Outdoors, wearing a wide-brimmed hat can shield your eyes from the sun, while avoiding walking in direct sunlight during midday hours can help minimise exposure to harsh light.
Diet and hydration
Although there isn’t direct evidence linking diet with glare sensitivity, ensuring optimal eye health through a balanced diet can be beneficial.
Consuming foods rich in antioxidants, like leafy greens, fish, and nuts, can help maintain eye health and reduce the risk of conditions like cataracts. Staying well-hydrated is essential for maintaining adequate tear production, which can help prevent dry eyes.
There are plenty of ways to manage glare sensitivity
Increased sensitivity to glare can significantly impact your daily life, making simple tasks such as driving or using a computer uncomfortable. While this condition can stem from various causes – age-related changes, dry eyes, refractive errors, migraines, medications, or environmental factors – there are plenty of ways to manage it.
Proper eyewear, treatment for underlying health conditions, adjusting lighting, and making lifestyle changes can all contribute to reducing discomfort. If glare sensitivity persists or worsens, it’s advisable to seek professional guidance to ensure that the condition is properly addressed and managed.
