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Tuesday, November 27, 2018

By John Martin


Wearing contact lenses is among the ways present that can be used by people to correct vision. Usually, individuals who prefer not to wear sunglasses wear them due to their size and other factors. An estimated 45 million individuals wear contact lenses in the US. Two thirds out of this number are females of different ages. When one needs Contact lenses Columbus offers the perfect location to visit.

The FDA classifies lenses under medical devices in the US. Therefore, they must meet certain regulations. The FDA ensures the lenses must be up to the standards enforced by the agency so as to be manufactured and sold. Yearly, different types of lens are rolled out to the market. Different types of lenses were invented and rolled out in the market at different times.

Firstly, several kinds of contact lens exist. Some of them are PMMA, hybrid, gas permeable, silicone hydrogen, and soft contact lens varieties. In the year 1938, hard or rigid lenses were introduced in the US market and their production is still ongoing. Each year, better varieties are being introduced. In 1971, soft lenses were introduced for the first time. Statistics show that soft contact lens varieties are used by more than 90 percent of all wearers of these devices.

Soft lens varieties are generally made using materials referred to as hydrogels. These are gel-like and water-containing plastics. The lens is thin and very pliable, which makes it to feel very comfortable to the front exterior of eyes. The popularity of wearing of contact lenses was made more popular by the introduction of these lenses. The eye adapts very fast to the feeling, making the devices very comfortable.

An advanced version of the soft lens is the silicone hydrogel lens. These kinds of lens allow increased amount of oxygen to penetrate them to the cornea as it features more porosity. This therefore creates more comfort and a healthy environment for the eyes for those wearing them. The devices can be said to be still relatively new in the market because they were only introduced in 2002. In the US, the devices are currently the most prescribed.

GP or RGP lens is the other name for gas permeable lens. It is a rigid type of lens designed to feel and look like PMMA lens. However, it is porous to oxygen unlike most rigid models. It is meant to be fitted nearer to the eye than other rigid types because of the fact that it is porous. It has become a more common replacement for rigid PMMA lens since its introduction in 1978.

A very good option for individuals that engage in sports is offered by these devices. One can wear them to enhance vision without the fear of them causing a safety hazard when they are engaged in sports. Actually, recognizing if one is wearing contact lenses is difficult. It is reported by many children that wear these devices that they feel better in terms of how they look.

However, one should be aware that these devices come with particular instructions on their use. People face serious problems because of mishandling or ignoring safety instructions that accompany the devices. A lot of people acquire serious infections yearly for using these devices wrongly.




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