Abstract:
The people of all age groups use
sunglasses as an aid to protect eyes
against glare or wind and also as a
fashion wear. The present younger
generations is using these glasses mainly
as fashion in different colours and
varieties. The sunglasses are mostly
manufactured in plane without power in
various sizes, colours and shades.
Photochromatic glasses are the latest
introduction in the range of sunglasses
in the country. These are special variety
of glasses with the characteristics that
when the sun light strikes on them the
invisible micro-crystals of silver halides
inside the glass automatically get darker
and imparts colour and shade to the
glass and in normal indoor light, the glasses revert to its colourless clear
transparency. These glasses also protect
eyes from UV rays and are useful both
as sunglasses and reading glasses.
