How to Choose the Right Sunglasses for UV Protection
October 15, 2026
Quick Answer:
To protect your eyes from UV light, choose sunglasses labeled “UV400” or “100% UV protection,” which block both UVA and UVB rays. Lens darkness and price don’t determine UV protection. Wraparound styles and a brimmed hat add protection because they limit light entering from the sides.
Sunlight can damage the eyes over time. Long-term UV exposure is linked to cataracts, pterygium (a growth on the white of the eye), and possibly age-related macular degeneration. Because the eyes of children absorb more UV than adult eyes, sunglasses matter at every age.
Why darkness can be misleading
Very dark lenses without UV protection can actually be harmful. They cause the pupil to widen, which lets more UV light reach the back of the eye. Always check the label, not the tint.
What to look for
- A UV400 or 100% UV label. This means the lens blocks light up to 400 nanometers, which covers all UVA and UVB rays.
- Polarization (optional). Polarized lenses reduce glare from water, roads, and snow. They make things easier to see, but they do not add UV protection on their own.
- Coverage. Larger frames or wraparound styles block light from the sides and top.
- Fit. Sunglasses should sit comfortably on the nose and ears without slipping.
Protection beyond sunglasses
A wide-brimmed hat cuts UV exposure significantly. Sunglasses are most important during midday hours and at high-altitude or snowy locations, where UV intensity is greater. UV can also reach your eyes on cloudy days, so wear sunglasses year-round in New England.
Frequently Asked Questions
Do cheap sunglasses protect my eyes?
Price doesn’t determine protection. A pair of inexpensive sunglasses with a UV400 label can offer full UV protection. Look for the label, not the brand or price.
Do I need sunglasses if I wear contact lenses with UV protection?
Some contact lenses block UV light, but they don’t cover the whole eye area. Sunglasses still help protect the eyelids and surrounding skin.
Are photochromic (transition) lenses enough?
Most photochromic lenses block UV, but they may not darken fully in a car because windshields filter some UV light. Ask your eye care provider about a backup pair for driving.
Ready to find the right pair?
Visit our eyewear department at 85 Constitution Ln, Ste 100c, Danvers, or call (978) 774-7033 . We can help you find frames and lenses with the right protection for your prescription.
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