Does Wearing Sunglasses Prevent Cataracts?

Cataracts are one of the leading causes of vision loss, particularly as we age. While age is the leading factor, long-term exposure to ultraviolet (UV) light is also thought to accelerate cataract development. So, where do sunglasses come in, and can something as simple as wearing the right pair of shades really help to protect your vision?

Can Sunglasses Prevent Cataracts?

Wearing sunglasses with full UV protection is a simple but effective way to reduce your risk of cataracts. Over time, UV radiation from the sun can damage the proteins in the lens of the eye, contributing to the cloudiness that defines cataracts.

Choosing sunglasses that block 100% of UVA and UVB rays (labelled UV400) helps shield the lens from this damage, particularly when worn consistently outdoors. Since age remains the primary cause, sunglasses can’t stop cataracts entirely, but wearing sunglasses with UV protection is important to prevent further damage to the eyes and to reduce the risk of cataract development, especially in bright sunlight.

How UV Radiation Affects the Eyes

UV light is invisible to the human eye but can have a profound effect on ocular health. The lens inside the eye acts like a camera lens, focusing incoming light onto the retina. Over time, repeated exposure to UV rays can cause oxidative stress to the lens fibres. This contributes to the gradual development of cataracts.

The Best Sunglasses for Cataract Prevention

Not all sunglasses are created equal. For the best protection against cataracts, we recommend looking for sunglasses that meet the following criteria:

• 100% UVA and UVB protection: This is the most important feature. Look for labels that say “UV400” or “100% UV protection.”
• Large or wraparound lenses: These provide better coverage, shielding your eyes from UV rays coming in at different angles.
• Polarised lenses: These reduce glare, improving comfort when you’re outdoors – especially near water, snow or reflective surfaces.
• Category 2–3 tint Durable materials: Lenses made from polycarbonate or Trivex are impact-resistant and lightweight, ideal for active use.
• Regulatory markings: Check for CE or UKCA markings, which indicate compliance with UK and European safety standards.

If you wear prescription glasses, ask your optometrist about prescription sunglasses with full UV protection.

Can Sunglasses Help if You Already Have Cataracts?

Sunglasses can’t reverse cataracts, but they can still be beneficial. If you already have cataracts or are waiting for surgery, wearing sunglasses can reduce glare, improve contrast in bright conditions, and protect your eyes from further UV-related damage.

At Optegra, we recommend that all patients (before and during recovery after cataract surgery) continue to protect their eyes with high-quality sunglasses, especially when outdoors for extended periods.

Expert Cataract Care at Optegra

While sunglasses for cataracts are a valuable prevention tool, the only effective treatment for cataracts is surgery. At Optegra, we perform tens of thousands of cataract procedures each year, using advanced techniques and premium lenses tailored to your lifestyle.

Our experienced consultants will guide you through every step of the process, from diagnosis to recovery. With success rates of 99.6% and private treatment options available, we’re here to help you see life more clearly.

What next? Get in Touch for Free, No-Obligation Advice.

To learn more about private cataract surgery and the advanced lens options available at Optegra, or to speak to an expert about your eye health, you can book a free, no-obligation consultation at a time that suits you.

Protecting your vision starts with the small things, like putting on a pair of sunglasses before you head outside.