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Contact Lenses
Focus
Bausch & Lomb
Zeiss
Johnson & Johnson
Coloured
Contact lenses FAQ
What types of contact lenses are there?
There are two different ways of categorizing contact lenses. One
is by wear type, and the other is by tint type.
Wear Type Characteristics
Disposable
Disposable lenses are the most highly recommended lens at GO-Optics.
This type of lens offers far more benefits than any other lens type.
Disposable lenses are worn and discarded every one to two weeks.
The lenses require less care than Daily Wear Soft, as they are replaced
more often.
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Daily Wear Soft
These lenses are worn on a daily basis and are removed nightly
to be cleaned. One pair of Daily Wear lenses will last six months
to one year, depending on the practitioner's prescribed wearing
schedule. These lenses are handled more frequently, which can
result in lost or torn lenses. Toric lenses are also available,
for patients who need a correction for astigmatism.
Extended Wear Soft
These lenses are more oxygen permeable and can sometimes be worn
longer than Daily Wear lenses. Some patients may be able to occasionally
sleep in these lenses, but this is determined by the doctor only.
The lenses, however, are thinner than DWS, thus must be handled
more gently.
Programmed Replacement
Soft
These lenses are also called Frequent Replacement Lenses. They
are worn on a daily basis and thrown away after one to three months
of wear, as instructed by the Optometrist.
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Gas Permeable
Gas permeable contact lenses are most often prescribed to patients
with astigmatism. The lenses may, however, be prescribed for spherical
patients. These lenses are made of a semi-rigid, silicon based plastic
that allows oxygen to pass through the lens and into the cornea.
The gas permeable contact lens is more difficult to adjust to due
to the rigidity of the lens. It takes about three weeks of wear
to become comfortable with the feel of the lens on the eye.
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Tint Type Characteristics
Clear
Contact Lens is completely clear. Can be difficult to see when
cleaning and placing in eyes, etc.
Visibility Tint, also called Handling Tint
Contact lens has a very light tint (usually blue), to make the
lens easier to see when handling it, cleaning it, putting it in
your eyes, etc. This tint is very light - it does not "tint"
your vision and will not change the color of your eyes.
Enhancing Tint
Lens has a tint which enhances the color of a similarly colored
eye. Your vision is not tinted - the central part of the lens
that you see through (the pupil) is kept clear. An enhancing tint
cannot change eye color to a different hue; for example, from
brown eyes to blue. For that, you need an opaque lens.
Opaque
It's called an "opaque" tint, but of course the lens
is not completely opaque. In an opaque tinted contact lens, the
part of the lens which covers the colored area of your eye (the
iris) is tinted with color so deeply that it blocks out, or opaques,
the natural color of your eye. This type of lens can change, for
example, brown eyes to blue. Your vision is not tinted - the central
part of the lens that you see through (the pupil) is kept clear.
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