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Single vision lens
In 99% of cases this is what first-time wearers will require. As the phrase suggests,
single vision lenses offer a single focal power and correct close-up or distance
vision. Typically, single vision lenses are worn for reading if you are long sighted
or presbyopic and for distance if you are short sighted.
There will come a time in your life when you may need glasses to improve both close-up
and distance vision. One option is to carry two pairs of spectacles around but this
can be both inconvenient and frustrating. Bifocals are two lenses in one, enabling
the wearer to see clearly at close-up and distance, but not inbetween.
Sometimes known as "bifocals without the line", varifocals are, in fact, much more
as they offer complete vision at all distances including the intermediate range between
close-up and distance. As they have no visible dividing lines, they are cosmetically
better than bifocals.
There are now light-sensitive lenses that react so quickly and efficiently to changing
light conditions you can wear them anywhere from a sunny beach, working in the office
or reading a book. In short, they are light when they need to be, at night or indoors,
but darken when they need to be in the sun. They also provide 100% protection against
the sun's harmful UVA/UVB rays.
Thinner and lighter lenses
You may have noticed some people's lenses look thick or bulbous. There are many lenses
which are now available in denser materials than ordinary plastic or glass. This
enables us to greatly improve the appearance of higher powered lenses. In addition,
aspheric surfaces are used which result in a thinner, flatter lens offering excellent
visual acuity, even in peripheral vision. Such lenses result in lighter, more comfortable
spectacles and a more aesthetically pleasing appearance. Companies such as Nikon
and Pentax specialise in this area.
In our workshop, rather than cutting standard 'off the shelf' lenses to fit your
frame, we are able to caculate the smallest lens form for your frame, resulting in
a thinner, lighter lens.
Anti-reflection coatings allow more light to pass through the lens enabling it to
appear clearer. They all but eliminate reflections with 99% of light entering the
eye. The lack of annoying reflections makes everyday tasks far easier, such as helping
to eliminate headlight glare when driving at night. They are particularly effective
on high-powered lenses. Hard coats protect the lens from minor abrasions, keeping
the lens clearer for longer.