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There are several criteria to
evaluate when it comes to determining which lenses are best for the
patient. Three factors play a critical role in your eyeglass
prescription: lens material, lens design and lens coating. Here's a breakdown
of each area.
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Lens
Materials |
- Plastic
Lenses: Stronger than glass and
half the weight. Maximum comfort and durability.
Plastic can be tinted to almost any color and density.
- High
Index Lenses: Revolutionary
high-index lens material offers prescriptions in a
thinner, lighter lens. No more "coke-bottle"
lenses! Provides comfort and UV protection.
- Polycarbonate
Lenses: The most
impact-resistant material. Shatterproof and
lightweight. Good for the active child or athlete.
Provides UV protection.
- Glass
Lenses: Durable,
scratch-resistant material. Provides superior optics.
- Photochromatic
Lenses: Lenses that darken with
ultraviolet light and lighten in the absence of ultraviolet
light. Available in gray or brown and glass or plastic,
these are a fine option for patients that are in and out of
doors many times during the day.
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Lens
Designs |
- Single-Vision
Lenses:
A popular choice for single usage or occupational glasses
(computer or reading glasses). Available in all lens
material.
- Flat-Top
Bifocals: Provides
vision for both distance and close-up work in one
lens. Offers variable bifocal widths to accomodate
many close-up jobs. Available in all lens
material.
- Trifocals:
Added
lens segments provide clear vision close-up, far away, and
in-between. Facilitates all types of work.
Available in all lens materials.
- Progressive
Multifocals:
Progressive
(no line) lenses offer all the benefits of bifocals and
trifocals, plus the cosmetic appearance of single-vision
lenses. They provide clear vision from up-close to far
away. Available in all
lens materials.
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Lens
Coatings |
- Anti-Reflective
Coating: An
extremely thin, clear lens coating that virtually eliminates
reflection. By allowing all available light to
pass through the lens, this coating reduces eyestrain
produced by glare and reflection from headlights and
computer monitors, increases contrast and improves clarity.
Cosmetically, this lens also enables others to see your eyes
more clearly. Anti-Reflective coating is an
excellent choice for public speakers, those working with
computers, or those patients experiencing difficulty with
night time driving.
- Scratch
Resistant Coating:
This
is a clear lens option that when added to standard plastic
lenses will dramatically reduce the chance of scratches to
the lens.
- Ultraviolet
Coating: This
virtually clear coating blocks UVA, UVB, and UVC bands of
ultraviolet light waves. Effective in reducing
the risk of cataract development. Sources
include fluorescent lighting as well as natural lights.
Especially important in high altitude areas where there's
more light exposure to UV.
- Tinted
Lenses:
Plastic lenses may be tinted any
color. This helps to block the bright light from the eyes.
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