Imagine you are standing on the shore of a calm lake in early
morning. What you see is a bright, glasslike mirrored surface
on the water, with no detail, little contrast, and poor color
saturation. As you slip on your polarized glasses, the bright,
glasslike mirror is replaced with a scene that shows detail and
has deep colors and good contrast. That’s what polarized
lenses can do. Photo-graphers use them to add bolder colors and
deeper contrast to their photographs. The polarized lenses remove
the glare and improve the visual quality of the picture, much
the same way polarized ophthalmic lenses perform for the patients
who wear them.
Polarized lenses are made from a special polarizing film that
is applied in the factory on the front surface of the lens. This
film allows light rays to be filtered, consequently improving
the vision in strong light conditions. Polarized lenses will protect
you from UV rays, glare and intense light. In combination with
a reflection-free coating, polarized lenses are ideal for fishing
and driving.
Polarized Sunglasses 
For years, boaters and fishermen have used polarized sunglasses
to reduce glare from the water that they spend so much time on.
In the past few years, however, the benefits of polarized sunglasses
have been realized by a variety of other outdoor sports enthusiasts
as well as by drivers and general use wearers. The popularity
of polarized lenses has increased dramatically, as has availability.
Besides boaters, people that benefit most from polarized sunglasses
include skiers, golfers, bikers, and joggers, who enjoy a clearer
view and elimination of glare.
These sunglasses can be used for driving and in fact can reduce
the glare that comes off a long, flat surface such as the hood
of the car or the surface of a road. Polarized sunglasses can
also be used indoors by light-sensitive people such as post-cataract
surgery patients or by those exposed to bright light through windows.
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