Gas
Permeable Contact Lenses
Little to the knowledge of a lot of people,
there is another counterpart of regular soft tints available in the
market. As they say, gas permeable contact lenses
are kind of low- profile because only a handful have been
patronizing such. This ocular aid is rigid but it should not be
confused with the “hard ones” that rose to fame in the second World
War.
The “hard ones” consist of a material dubbed as
polymethyl methacrylate (PMMA) where it was regarded as an
indispensable substance before 1971, the year where the regular
soft ocular aid was introduced. The problem with PMMA was that it
was very complicated to utilize as it does not permit any oxygen
badly required to enter the eyes unlike the gas permeable
contact lenses.
Gas permeable contact lenses are actually not
novel in the industry as it was launched since the late stages of
the 1970’s. However, this ocular aid is much more new than the
regular soft. Most of this kind of tints is integrated with a
comfortable plastic known as silicone. The mentioned element is
porous to oxygen where the aftermath is healthier vision, avoidance
to deposits and better durability.
It can never be denied that the regular soft is
much more famous than gas permeable contact lenses. The reason is
that this ocular aid is not that easy to wear so there is a call to
adapt in a longer period. However, this kind of tint has several
benefits such as the stiff component it is constructed of. Even
when you do countless eye movements, it will still retain its
contour due to its facet of crispiness.
Try stepping on gas permeable contact
lenses and you will discover that it is not that easy to
break into pieces. Unbelievable as it may sound but it is brought
about by certain materials that do not hold any water. Due to such,
this ocular aid does not attract lipids and proteins that originate
from the glands that excrete tears. As for the regular soft, when
you tear it apart, it will only require a lesser amount of
force.
For those people who obtain unsatisfactory
results in wearing tints of the regular soft kind, they usually
shift to an ocular aid which is porous to oxygen. This is
especially true to individuals who are suffering from astigmatism
where they do not achieve their desired sight sharpness. As for
those who have presbyopia, they choose between designs of bifocal
and multifocal which have been proven to work effectively.
|