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sunglasses
,
When you’re choosing
does UV protection
matter?
Dennis Robertson, M.D.
with skiers, boaters and hunters.
Lenses that block all blue light
are tinted amber.However,
when driving, it’s recommended
that tinted sunglasses be gray
to ensure proper traffic light
recognition.
Polarized lenses.
Polarized
lenses reduce reflected glare,
such as sunlight that bounces off
snow or water. They’re useful for
skiing, driving and fishing.
Photochromic lenses.
These
lenses darken or lighten as
the amount of available light
changes. However, they take
time to adjust to different light
conditions.
Polycarbonate lenses.
Polycarbonate lenses offer impact
protection during potentially
hazardous sports and activities.
Mirror-coated lenses.
Mirror-
coated lenses reduce visible light.
Gradient lenses.
Single-
gradient lenses, which are dark
on the top and lighter on the
bottom, reduce glare while
allowing you to see clearly.
They’re useful for driving, but not
sports. Double-gradient lenses
are dark on the top and bottom
and lighter in the middle. They’re
useful to wear during water or
winter sports, but not for driving.
Yes, ultraviolet (UV) eye protection matters.
UV radiation from the sun can damage not only
the skin of your eyelid but also the cornea, lens
and other parts of the eye. UV exposure also
contributes to the development of certain types
of cataracts and possibly macular degeneration.
When you’re choosing
sunglasses, look for UV-
protection details on product
labels. Choose sunglasses
that block 99 to 100 percent
of both UVA and UVB rays.
Skip sunglasses that neglect
to offer details about their
UV protection. Keep in mind
that the color and degree of
darkness sunglasses provide
have nothing to do with the
sunglasses’ ability to block UV
rays. Also, opt for wraparound
sunglasses or close-fitting
sunglasses with wide lenses
that protect your eyes from
every angle.
Standard prescription
eyeglasses in the U.S. are
treated to provide UV
protection while retaining a
clear, nontinted appearance.
Some contact lenses also offer
UV protection, but should
be worn in combination
with sunglasses to maximize
protection.
Of course, UV protection isn’t
the only consideration when it
comes to selecting sunglasses.
In addition to UV protection,
consider these extras:
Blue-blocking lenses.
Blue-blocking lenses can
make distant objects easier
to see, especially in snow
or haze. They’re popular
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