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SPECTACLES
Spectacle
Lenses
While
it is common to take a long time on selecting the frame, it is often
thought that there is little to choose from when it comes to the
choice of lenses. The reality is very different. We are pleased
to supply top quality lenses from all the leading lens suppliers
that offer a range of designs and materials to suit the changing
and challenging needs of today's spectacle wearer.
Lens Technology
Many
lenses today have very sophisticated, computer-designed surfaces
that mean lenses today are thinner, lighter and flatter than ever
before. Lenses are also available that react to UV darkening in
the sun and lightening again almost as quickly when you return indoors.
In addition they can be coated to absorb UV, reduce scratches and
reduce glare.
Sight Correction
Lenses can be
made to correct distance vision, reading vision or are available
for people who need both a distance and reading correction. Bifocals
are often worn when a reading and distance prescription is required,
but wearing these lenses can lead to difficulties especially when
an intermediate distance correction is necessary. Nowadays wearing
a lens that varies in focus is often preferred enabling the wearer
to see clearly at all distances.
Glass Lenses
The traditional
material used for spectacle lenses. It is available in extra thin
forms, can be supplied so that it reacts to light or tinted with
a solid colour for sunglasses.
Plastic Lenses
The most popular
material used nowadays. Traditionally, plastic lenses are lighter
than glass but are thicker.
Lens manufacturers
are continually striving to produce thin, lightweight plastic lens
alternatives. High index lenses are now as thin as the thinner glass
lens materials. Additionally the highest plastic lens materials
are up to 45% of the weight of high index glass alternatives.
(Picture
from www.essilor.co.uk)
Asperic Designs
As
well as using thinner high index materials, lenses can now be made
flatter and are much neater in appearance than standard plastic
lenses.
(Picture from www.kodaklens.com)
Polycarbonate Lenses
New polycarbonate
lenses are ideal for those with an active life. They are virtually
unbreakable, over 10 times more resistant than traditional plastic
lenses. There can be up to 30% lighter and 25% thinner than the
equivalent standard plastic lenses making them very comfortable
to wear.
Transitions & Sunsensors
We
supply the two major designs of plastic lenses that react to light
conditions. They are available as single vision lenses, bifocals
and varifocals. Sunsensor lenses are available in brown and grey,
while transitions are also available in a stylish green colour.
(Picture from www.essilor.co.uk)
Coatings
Plastic
lenses can be coated to help protect them from scratches. Both glass
and plastic lenses can now be multicoated to increase light transmission,
clarity and cosmetic appearance. Top quality coatings ensure lenses
give you the clearest definition and the best contrast throughout
their life. It is particularly useful for VDU users and drivers
at night helping reduce reflections, glare and dazzle. (Picture
from www.hoya.co.uk)
UV Protection
People are far
more aware today of harmful UV. Not only should we cover up when
we are in the sun, we should protect our eyes from this radiation
as long-term exposure can lead to cataracts. Lenses can be coated
with a UV inhibitor to filter out this harmful radiation particularly
useful if you ski or visit tropical countries regularly.
Hobbies
We
also advise on spectacles for hobbies and sports such as swimming,
skiing, snooker, squash and cycling.
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