Origin And Variations Of Contact Lenses

By Author: Marie Chrismer
Total Articles: 64
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All of us have a general idea about contact lenses. But this topical discourse tends to give you some important information about the origin and various specimens about these lenses. Seeking for the root of contact lenses will take us back to 1508, when Leonardo da Vinci penned a sketch of lenses but did not give any idea about its production. After 300 years of the sketch, it was fabricated and worn on the eye. The lenses which we use to wear now, that is, modern lenses and the gel used to wear it were constructed by Czech chemist Otto Wichterle and his assistant Drahoslav Lim. William Feinbloom is credited with the production of contact lenses containing both glass and plastic in the year 1936.

Usually we wear glasses for correction, and sometimes for the optimization of style quo. So, emergence of interrogation is certain about the use of the contact lenses. To begin with, we may state that, contact lenses are miraculous pieces made of plastic that allow you to rectify your vision without using glasses. If you want more specific definition, it can be said that, contact lenses are small visual devices made with curved ...
... pieces of plastic that may adapt to conform directly to the cornea of user's eye. It is used mainly for corrective purpose of vision problems such as myopia, and hypermetropia. Additionally, critical visual problem like keratoconus and aniseikonia, which may not be accurately corrected with glasses, can be cured with lenses. Apart from these corrective measures, contact lenses are also used for therapeutic and cosmetic aspiration. However, lenses are the invisible agents of perfect vision which have transformed the stereotypical notion of eye wear. That is why around 87 million people globally are using these lenses with pride.

There are many types of contact lenses available in the market, for example, bifocal , colored, disposable, toric, extended wear, gas permeable, etc. soft contact lenses can be classified in two sections-disposable, and annual soft contact lenses. People not having enough time for daily care of their contacts, they use disposable ones. Daily disposable contacts generally can be worn for a week or two and they do not come with cleaning solutions. The annual soft contacts can last up to one year and it needs daily care. It is used widely because it is made of soft material and allows oxygen to pass through it. This type of lenses can be worn for a maximum period of 14 hours at a stretch.
The bifocal lenses have received a vivacious approach recently for its multifunctional aids for presbyopes which eye resigns focusing on near objects with progressing age.
Astigmatism is a disparaging ophthalmologic condition which does not allow cornea to properly focus an image onto retina, and thus results a blurred image. For accurate rectification of this type of vision problem, toric lenses are generally used. This type of contacts provides clarity of vision.

Gas permeable classes are known for its durability and it transmits more oxygen to the eye than the soft contact lenses.

There are many contact lenses which are tinged with light colors which are mainly used for decorative purposes.

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