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A Brief Story of Contact Lens .pdf

Original filename: A Brief Story of Contact Lens.pdf
Author: Hasibur Rahman

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A Brief Story of Contact Lens
Market of contact lens is spreading day by day. It has become popular with the teenagers
and young people. People use different types of contact lenses for so many reasons. But the
history of contact lens is very old. Leonardo DA Vinci, the greatest Italian painter, sculptor,
inventor came up with the idea of contact lens. He did not implement the idea and did not
think about contact lenses to be used to correct the vision. Yet, his idea inspired other
persons named Thomas Young, Sir John Herschel etc. to implement it later.

At last, in 1888 Adolf Fick, successfully fit contact lenses. Initially, he fitted contact lenses in
rabbits experimentally and later himself. Heavy Blown glass had been used to make those
lenses. Later, in 1960 with the help of improved manufacturing technology a lens named
PMMA became the first corneal lens which got more mass appeal. But the most
disadvantages of this lens were oxygen can not transmit through this lens. It can cause
serious clinical effects. In 1965, National Patent Development Corporation introduced rights
to produce lenses and gave sublicensed to Bausch Lomb to manufacture lenses in the
United States.

Depending on the material, primary function and wearing schedule Lenses can be classified
in so many categories. Let’s have a look on the below categories:

Corrective Contact Lenses
To correct and improve the vision these can be used. Myopia, Hypermetropia, Astigmatism
can be corrected by this lens. To get the clear vision with the accurate power with this lens,
the lens directly focuses the light so that it enters the eye.

Multifocal Contact Lenses
These lenses have multiple focal points and generally developed for constant viewing within
the center of the lens.

This kind of lenses has only one focal point per lens. Usually, this single vision lens used to
focus one eye for distance vision which is the person’s dominant eye and another eye for
near vision so that the person’s brain can be used to the setup to see very much clearly from
all distances.

There are some other types of lenses also in the market. Cosmetic contact lenses is one of
them which got much popularity to change someone’s eye appearance. Also, refractive
error can be cured by cosmetic lens. But this lens is not advisable to use as different types of
irritations, infections can be occurred by this lens.

A newly invented lens named circle contact lens become a new craze in Japan, China and
South Korea. Circle lenses extended the looks of the iris directly on the sclera by possessing
a dark tinted area surrounding the iris. The outcome is, the outside appearance associated
with a bigger, wider iris.

Generally, contact lenses are safe as long as it is being used as per rules and regulations.
Incorrect use of contact lenses can potentially affect eyelid, cornea and the conjunctiva. Due
to inaccurate wearing schedule many complications can arise. After a designated time
schedule contact lenses muct be changed. Also, mishandling of contact lenses increase the
chance of infection. Wash hands before touching the contact lens with soap and dry hands
with tissue or towel. So, special care should be taken to the contact lenses.


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