Defining the Various
Eyeglass Lens Options Part II
What Are The Types of Various Eyeglass Lens?
Progressive lenses have the latest vision correcting capabilities.
Most of the time, they are often prescribed to treat presbyopia,
these lenses get rid of the need for the telltale horizontal
lines which separates the different prescriptions. This is
due to the unique mapping technology which positions the different
prescriptions onto different areas of each lens.
Apart from the near distance and far distance prescription
positioning, there is also an area in the center for intermediate
vision. This area will help the transition from near to far
and vice versa and achieves this using a number of different
curves which have been designed to blend together. A better
understanding to this progressive technology has made custom-designing
progressive lenses to adapt a person's lifestyle much easier.
And it allows the manufacturers figure out how to fit so much
capability into smaller eyeglass frames to allow those with
presbyopia, who tend to be older, can have eyeglasses with
a more contemporary look. You should expect an adaptation
period and before ordering make sure you can exchange the
lenses should you not be able to adjust.
Multifocal lenses are yesterday's bifocals and trifocals.
As the name suggests, multifocals have multiple focusing abilities
and are very commonly prescribed for activities such as reading
and computer work. These lenses still have the telltale lines
or curves which delineate the different prescriptions and
this is why more people are making the switch to progressive
lenses. Bifocals can offer near vision and distance vision
correction, while trifocals include near, far and intermediate
correction. Multifocal lenses are usually prescribed when
needed for specific job functions. And due to this reason,
they're not generally designed to be worn daily, it should
be worn only when performing the specific task for which they
were designed.
Polarized lenses will block out damaging ultraviolet rays
and enhance color, making these eyeglass lenses a good choice
when driving. Colors are crisp and defined since they're not
obstructed by the sun. Polarized lenses help reduce glare
and haze, making visibility much better.
Polycarbonate lenses are the perfect choice for you when
you need eyeglass lenses which are durable and offer built-in
protection from damaging ultraviolet rays. Even though they
are great at resisting impact, these eyeglass lenses are surprisingly
thin and weigh less that regular plastic lenses. Polycarbonate
lenses get their strength from the manufacturing process which
during the process helps make the lens more flexible and less
brittle. The material is not scratch-resistant however, and
most manufacturers apply a coating to protect the lenses from
this type of damage. Many parents choose this type of lens
for their children as do those are active in sports.
Tinted lenses are more popular and are preferred by many
due to the fashion statement. Others also choose tinted lenses
to do double-duty as sunglasses. Once a tint is done, it will
be there all the time, which is one way these lenses differ
from photochromatic lenses. The tint can be solid or it can
gradate from darker to light or vice versa. Tinting lenses
involves submerging the eyeglass lenses into colored warm
water.
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