Different Types of
Contact Lenses
Wish to Know More about the Types of Contact Lenses?
The types of contact lenses which available in the market
today are almost as much as the corrective issues they're
designed to correct. However, it is a different story today.
Many people are purely aesthetic, enabling a wearer to change
eye color from brown to violet, for example, or to change
from the appearance of human eyes into eyes which resemble
that of a cat or wolf or even an alien!
Contact lens prescriptions also includes information on proper
fit, measuring such attributes as curvature and diameter.
But the prescription also contains other pertinent information
such as proper measurements for correcting vision and also
the brand of contact lens believed most suitable for the patient's
situation.
Of course, you need not understand all the different makes
and models of contact lenses. That's more the responsibility
of vision specialists since they're usually the ones responsible
for doing the the final determination based on their training,
knowledge and past experience.
There are a couple of ways to categorize contact lenses.
One of the ways is to categorize contacts by material type.
Plastic is the material of choice when it comes to contact
lenses. Its fluid nature enables a more comfortable fit and
its availability makes contact lenses more affordable. Plastic
lenses are also in 3 general categories including gas permeable,
hard and soft.
Another way to classify contact lenses is by their wear and
replacement schedules. As for wear schedules there are daily
wear and extended wear lenses. Daily wear lenses are meant
to be used and removed every day whereas extended wear contact
lenses which can remain in place for one to several weeks
before removing.
Depend on replacement schedules, there are disposable contact
lenses and non-disposable ones. Daily wear disposable are
worn once and dispose immediately, completely getting rid
of the need for cleaning. Regular disposable contacts are
worn several weeks before being thrown away. Again, the goal
with disposables is less maintenance which will also lower
the risks of infection and other eye problems. Non-disposables
require careful and regular maintenance as they need not be
replaced until torn or until a patient's prescription changes.
And finally there are some special kind contact lenses. For
example, theatrical contact lenses started out being designed
for and used by actors and other performers. Giving eyes the
ability to change from normal-looking to horrific and demonic,
theatrical lenses have become more and more popular among
everyday users. Used primarily as a way to change a person's
look, the lenses generally are not designed for corrective
purposes, but they do require a prescription for proper fitting.
Besides theatrical lenses, there are contact lenses which
offer protection against damaging ultraviolet light - lenses
called varichrome which will darken when exposed to bright
sunlight making sunglasses an unnecessary accessory, and contact
lenses designed to change the color of one's eyes.
Then there are the specialized contact lenses such as toric
lenses which are meant to correct more troublesome astigmatisms,
bifocal contact lenses which help a person see both close
up and far away, spherical or aspherical lenses, and monovision
lenses which will help with close up vision and the other
lens is devoted to distance vision.
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