Sunglasses protect the eyes and surrounding skin from ultraviolet (UV) radiation, a primary driver of cellular damage and photoaging. This mitigates the long-term risk of age-related macular degeneration, cataracts, and skin cancers around the eye, preserving visual acuity and skin integrity, which are key components of healthspan.
Verdict
A simple, essential tool for preserving long-term vision and skin health.
HEALTHSPAN IMPACT
Moderate
RISK LEVEL
Very Low
EVIDENCE GRADE
A
MONTHLY COST
$15 - $250
Protocol
- Wear high-quality, UV400-rated sunglasses during any significant sun exposure.
Flags
- Ensure lenses provide 99-100% UVA/UVB protection, often labeled as 'UV400'.
- Lens darkness (tint) does not correlate with the level of UV protection.
- Polarization reduces glare but is a separate feature from UV protection.
- Poor optical quality in very cheap lenses can cause eye strain or headaches.