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, have 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, or both.
- 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
All content is provided for education and information, and is no substitute
for the advice of your optometrist.
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 herein.