Contact Lens: Types, Designs and Features
Bifocal contact lenses, types soft contact lenses, toric contact lenses
People suffering from farsightedness, astigmatism and nearsightedness
need to wear eye glasses or contact lens. These will provide you with
correct vision to view objects. Some people prefer using eye glasses while
others prefer wearing contact lens.
Contact lens provides one with an unobstructed vision which is not possible
by wearing glasses. And this is why the sport persons prefer using contact
lenses than the glasses.
Contact lens is in use past many decades but still there are many people
who believe that wearing a contact lens is not safe for the eyes. However,
the fact is easier and healthier contact lens options are now available.
In order to buy one you need the prescription of an eye specialist. After
testing your eyes he will suggest you with the right kind of lens.
Different Kinds of Contact Lenses Designs
There are various types of lens designs available for different vision
problems. They are
Spherical contact lenses these help to correct nearsightedness or
farsightedness.
Toric contact lenses it corrects astigmatism, hyperopia and myopia.
Bifocal contact lenses these contain various zones for far and near
vision to correct presbyopia.
Orthokeratology contact lenses these are designed to bring back the
shape of cornea while sleeping.
Various Features of Contact Lenses
These lenses are available in different features like
Colored lenses available in various colors such as green, grey, blue,
tortoise and brown.
Prosthetic contact lenses these lenses are for people who have disfigured
eye due to any disease or an accident. This looks similar to their normal
eye.
Special effect lenses it is also known as theatrical, costume or novelty
lenses. This gives your eyes a look of a zombie or a cat.
Custom lenses when the regular lenses give you no help, opt for this
design of lens.
Hybrid lenses has got the GP center with soft outer part. Provides
comfort and crispy optics of a soft and large lens.
UV Inhibiting Lenses provides an ultraviolet blocker which is not
visible by simply looking at the contact lens.
Types of Lenses
There are three kinds of lenses
1. Soft lens it is made from water containing and gel like plastics.
This is most commonly used. They are little larger than the iris.
2. Hard lenses these are made from Lucite or Plexiglas, also known as
PMMA. These are rarely used.
3. GP lenses they are also called as oxygen permeable or RGP lenses.
They are rigid and waterless plastics and they are smaller than the iris.
It is good for high astigmatism and presbyopia.
