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Origin Of Contact Lenses

by Amy_Nutt

Buying contact lenses can be a very exciting time for a person
because it changes the way they see everything. The world can be
seen in a way that has little distortion, things are their
correct size, and all is seen at the proper distances. In a way,
it is a type of shell shock when the contacts are in and the
person sees the world for the first time through them. But who
invented the contact lens? Where did it come from? These are good
questions since it is a mystery as to who developed the concept
of the contact lens. However, you may be surprised at the history
of these little round pieces of plastic that allows millions of
people to see the world as it is.

The reason why it is a debate as to who developed the concept is
because Leonardo da Vinci had sketched what he thought a lens
that fits over the eye should look like. Then Rene Descartes came
up with the idea of the contact lens in 1632. Of course at that
time, nothing ever came of it until 1801 when Thomas Young
developed a way to correct his own vision. He did this by putting
a microscopic lens at the end of a glass tube that was filled
with water.

However, 1887 and 1888 were the years in which larger strides
were made to develop a contact lens and free those who felt they
were restricted by their spectacles. These were the years in
which glass contact lenses were made, but they were not
comfortable. They only corrected a small number of vision
problems, so they weren�t exactly considered a success. What they
were considered was a step in the right direction.

It wasn�t until 1948 when Kevin Touhy immediately figured out
that contact lenses could be constructed from the new polymethyl
methacrylate (PMMA) that showed up on the market. He was awarded
the patent for the first plastic contact lenses and was much more
comfortable than the glass contact lenses that had been developed
sixty years before. However, it was in 1961 that Czechoslavakian
Otto Wichterle developed the soft contact lens and that lens
continues to be the choice of contact lens wearers. But the hard
contact lens continued to be used until the soft contact lens hit
the market in 1971.

Contacts continued to evolve after people all over the world
started taking advantage of the soft contact lens. In 1978, gas
permeable lenses were made available. These lenses are hard
contact lenses that allow oxygen to flow freely through them to
the cornea. This is important to allow the eye to breathe.
However, the contacts could only be worn for short periods of
time. It wasn�t until 1981 when contacts were approved for
extended wear. Still, the contacts had to be thrown away every
week. If worn too long, then the wearer risked an eye infection.
In 1986, the overnight wear of gas permeable contacts was
approved.

But it was in 1987 that the disposable contact was introduced.
These soft lenses could be worn anywhere from a single day to up
to two weeks before being thrown away. It was suggested that they
be taken out at night and put in every morning in order to allow
the eye to receive 100% oxygen at night. These contacts are still
used today, but there have been others introduced on the market.

In 2001, the extended wear disposable contact that allowed wear
for up to 30 days without removing the contacts at night were
introduced on the market. Now wearers are able to see 24/7. Some
wearers are not able to wear these lenses, so they continue to
use the two week extended wear, but these contacts have once
again changed how the world sees.

Clearly Contacts Canada is the largest online optical store in
Canada. Massive selection of inventory offering all the major
brands of <a href="http://www.clearlycontacts.ca/">contact
lenses</a> as well as <a
href="http://www.clearlycontacts.ca/glasses">eyeglasses</a> and
sunglasses to meet all of your vision needs.

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