What Are Gas Permeable Contact Lenses?
Gas permeable
contact lenses are not really well known by a lot
of people. These fairly hard lenses haven't really been
publicized that much and can be confused with hard contact lenses that
became popular in world war two.
In fact, gas permeable lenses were created in the late 70's but
were soon overtaken in popularity by the soft style of lenses.
These were made out of silicone which is also porous but also
lightweight. This gave benefits such as longer lasting, a greater vision and
didn't seem to attract as much materials as other lenses.
These hard contact lenses were made of PMMA but these had
problems because they didn't allow the oxygen to enter the eyes like the
gas permeable contact lenses do. The gas permeable type is porous
to oxygen which helps eliminate problems and increases
visibility.
It didn't really become popular due to the invention of the soft
contact lens. These are more comfortable to wear and can be worn
longer than the gas permeable ones. Although, these types can be
more durable in construction and can last longer than soft ones.
It is really hard to break a gas permeable contact lens. Even
if you sit or stand on them they would rarely break. It is only however,
when people have problems wearing the soft lenses that they
switch to the gas permeable type. These can give better sharpness
to vision especially for people who suffer from astigmatism.
Also, for people who suffer from presyopia, they have the option of
both bifocal lenses and multifocal to choose from. Both have been
proved to work effectively.
If you can get used to wearing them, then gas permeable contact
lenses can be a good, long lasting, durable solution. They can even help
to improve your sight permanently, more than non-permeable ones.
Whatever problem you are suffering from with your sight, there
are contact lenses to help. Just ask for advice or search online and
you're sure to find all the information you need about contact
lenses and eyesight in general. You may not know you have a problem with
your sight unless you get checked out. It is not always just a
case of blurred vision that you realise you have a problem with your
sight.
of people. These fairly hard lenses haven't really been
publicized that much and can be confused with hard contact lenses that
became popular in world war two.
In fact, gas permeable lenses were created in the late 70's but
were soon overtaken in popularity by the soft style of lenses.
These were made out of silicone which is also porous but also
lightweight. This gave benefits such as longer lasting, a greater vision and
didn't seem to attract as much materials as other lenses.
These hard contact lenses were made of PMMA but these had
problems because they didn't allow the oxygen to enter the eyes like the
gas permeable contact lenses do. The gas permeable type is porous
to oxygen which helps eliminate problems and increases
visibility.
It didn't really become popular due to the invention of the soft
contact lens. These are more comfortable to wear and can be worn
longer than the gas permeable ones. Although, these types can be
more durable in construction and can last longer than soft ones.
It is really hard to break a gas permeable contact lens. Even
if you sit or stand on them they would rarely break. It is only however,
when people have problems wearing the soft lenses that they
switch to the gas permeable type. These can give better sharpness
to vision especially for people who suffer from astigmatism.
Also, for people who suffer from presyopia, they have the option of
both bifocal lenses and multifocal to choose from. Both have been
proved to work effectively.
If you can get used to wearing them, then gas permeable contact
lenses can be a good, long lasting, durable solution. They can even help
to improve your sight permanently, more than non-permeable ones.
Whatever problem you are suffering from with your sight, there
are contact lenses to help. Just ask for advice or search online and
you're sure to find all the information you need about contact
lenses and eyesight in general. You may not know you have a problem with
your sight unless you get checked out. It is not always just a
case of blurred vision that you realise you have a problem with your
sight.