When we find ourselves sensitive to the outside sunlight, one tends to
squint, and we may reach for a pair of “sunglasses”.
It is not the darkness or the color of the sunglasses which will make
you feel more comfortable.
The reasons for our sensitivity to the light are not only the brightness,
- Uncorrected vision is a major source of our discomfort. Anything that
is not seen clearly is actually a source of glare. So wearing proper
prescription eyewear will resolve 50% of your sensitivity to the sun.
- Ultraviolet radiation is another reason we tend to be sensitive. UV can
burn your corneas, and leave you very photophobic. (light sensitive).
You must be sure any eyewear has UV filtering capabilities. And if it
does, does it filter all of the UV spectrum, or just a portion. Beware of
sunglasses which claim to filter UV; in actual fact any piece of plastic
or glass will filter UV to some extent, but not enough to protect your
valuable eyes completely. Colored lenses claiming to be blue blockers
may not protect you eyes completely.
- Reflective glare- bright sheen when near water, or on the road while
driving is the most significant source of our discomfort in the bright
sun. There is only one optical lens which will protect you from the
source of glare. It is the polarized lens.
Polarized lenses are the only true protective sunglasses, and are available
in most forms of prescription eyewear. They protect you from both
GLARE and UV, as well as correcting your vision when a prescription
is made of this lens. Polarized lenses should not be confused with
photochromic lenses which change their darkness with sunlight.