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| Bifocals |
| Bifocals
prescription specs, or lenses that combine two different powers, are prescribed
to aid both near and far vision in one pair of lenses. Usually the lower part
of the lens is to help see clearly at close distances and the upper part is to
aid focusing at far distances. Bifocal glasses have been the correct answer to
presbyopia. |
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| The segment that is devoted to near-vision correction
can be in one of several shapes. We have two types of bifocals lens available
with us: |
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| Executive Bifocal |
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The
lens is divided into two parts: an upper part for distant viewing and a lower
part for near point viewing. The straight line dividing the two parts may be
above, or below the normal line of sight for distant objects, and both parts
provide a wide field of view. |
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| Flat Top Bifocal |
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It comes in a shape of half-moon, which is also called a flat-top or D rim.
This type of lens is satisfactory for occasional near-point work or near-point
work that is usually in, or may be easily moved to, the lower part of the field
of view. In this case, however, lateral viewing of near point objects is
restricted. |
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| Progressive lens (no line) |
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Progressive
lenses are a part of bifocal lenses however they have no line. They offer near,
intermediate and distant vision correction with no rapid changes or hideous
lines. The change in vision correction is much less noticeable and more gradual
than with old style bifocals, hence progressive lens also improve vision in the
middle distances. |
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| Ultraviolet (UV) |
| Ultraviolet
(UV) protection is invisible to the naked eye. UV treatment in eyeglass lenses
blocks the rays that burns the skin and can damage the eyes. An ultraviolet
treatment is simple and quick to apply to most plastic eyeglass lenses, and it
does not change the appearance of the lenses at all. |
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| ANTI REFLECTIVE COATING |
| Anti
reflective coating also known as computer lenses. A common problem with
prescription glasses and sunglasses is called "back-glare” which is light that
hits the back of the lenses and bounces into the eyes. The purpose of an
anti-reflective coating is to reduce these reflections off the lenses. They are
perfect for night driving and computer use because they absorb reflections and
increase the light that passes through the lenses, providing sharp,
fatigue-free vision. Anti-reflective coated lenses improve your eyeglasses
appearance by making your lenses look invisible. |
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| ANTI SCRATCH COATING |
| Ant
scratch coating is a special coatings have been developed to help protect
lenses from normal scratching as lightweight plastic lenses can be more easily
be scratched than glass lenses. Anti-scratch coating does not affect the
optical description of the lens. Coated lenses can be easily cleaned and
sanitized. |
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| PHOTOCHROMIC LENS |
| Photo
chromic lens change from light to dark in response to changing levels of UV
light. They do not replace sunglasses in all situations, because the windshield
filters UV light, which keeps these lenses from darkening. In addition to their
convenience and fashion appeal, they are perfect for people who are sensitive
to light. |
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| Tints |
| Tint
lenses or fix colour lenses, as opposed to the changeable photochromics,
remains constant at all times. Tints are available in 40 colours. They are
applied to plastic lens materials through a process of absorption. The lenses
are immersed into a warm colour bath, and depending on the length of time they
sit in the tank, emerge in varying shades of darkness. |
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