Ultraviolet rays can increase the risk of cataracts and age-related macular degeneration. The most protective sunglasses are large-framed, close-fitting, and wraparound. Look for a label that say "blocks 99-100% of UVA and UVB rays" or "absorbs up to 400 nm of UV radiation."
Tint is mainly a matter of preference. Darker lenses don't necessarily provide more protection.
Polarized block light waves that align in horizontal patterns when reflecting off flat surfaces, so they're useful for driving, skiing, and fishing.
Mirror coating is derived from thin layers of metal coating ordinary lenses and doesn't automatically convey UVA/UVB protection.
Blue blocking are amber-colored lenses that protect eyes from blue visible light, to which the retina may be more sensitive.
Impact resistant is a requirement of the Food and Drug Administration for all sunglasses to survive an impact test without fracturing but not to be shatterproof.
Polycarbonate is a plastic that resists impact especially well.
Photochromic lenses lighten or darken in response to sunlight's intensity.
Sources: American Academy of Ophthalmology, Consumer Reports
Subscribe to:
Post Comments (Atom)
Posts
No comments:
Post a Comment