Sun and UV light

Why protect your eyes?

• Repeated UV exposure can contribute to cataracts and growths on the eye, such as pterygium. Strong exposure can also burn the eye surface, causing photokeratitis or ‘snow blindness’.

Check the protection label

• Choose sunglasses labelled 100% UVA and UVB protection or UV400. Darker lenses and a higher price do not prove better UV protection.
• Polarized lenses reduce reflected glare, but polarization alone is not a UV rating. Check the UV label separately; ask an optician if you are unsure.

Combine sunglasses with a hat

• Well-fitting, large or wraparound frames reduce light entering from the sides. A broad-brimmed hat adds protection.
• UV-blocking contact lenses do not cover the whole eye or surrounding skin. Keep using sunglasses outdoors.

Protection beyond sunny summer days

• UV can pass through clouds. Exposure can be greater at higher altitudes and around reflective water, sand or snow; use protection all year.
• Seek shade and limit prolonged exposure when the sun is strongest around midday. Avoid tanning beds.

Remember children

• Help children wear properly fitting UV-protective sunglasses and a sun hat. Toy sunglasses without a protection label are not a substitute.

Pain or blurred vision after exposure?

Pain, watering, redness or light sensitivity after intense UV exposure may indicate photokeratitis. Arrange prompt eye assessment; seek urgent help for severe pain or a change in vision. Do not assume it is only glare.