Eyeglasses have come a long way over the years. As the general population continues to age, more and more people are wearing glasses. Eyeglasses themselves have become fashion accessories. The variety of lenses on the market, meanwhile, has made consumer awareness more important.
- Glass is more durable and resistant
to scratches, but less impact resistant.
Plastic lenses are thinner
and lighter, more impact resistant, but scratch
Polycarbonate is like plastic,
but even more impact resistant.
- Invisible bifocals
- Progressive lenses
- Trifocal or multifocal
- High index (thinner lenses for strong prescriptions)
- Photochromatic or light sensitive
- Safety lenses
- Tinted lenses can be functional, fashionable,
- Sunglasses soften indoor or
outdoor light. Lens tints can be uniform or gradient,
lightening gradually from top to bottom.
Chemical coatings serve many purposes:
anti-scratch coating minimizes lens abrasions; anti-reflective
coating eliminates frustrating reflective glare; metallic
or mirrored coating is popular with sunglasses; and
UV coating blocks solar ultraviolet radiation.
All content is provided
for education and information, and is no substitute
for the advice of your optometrist. This information
is provided courtesy of the British Columbia Association
of Optometrists (B.C.A.O.). The B.C.A.O. assumes
no responsibility or liability arising from any errors
or omissions or from the use of any information contained