Today, there different types of contact lenses available to alleviate or correct different types of eye conditions. One such contact lens is the Rigid Gas Permeable (RGP) contact lens. Rigid Gas Permeable lenses are also known as Gas permeable (GP) and oxygen permeable lenses. RGP contact lenses are designed to correct certain conditions that cause vision difficulties.

To replace PMMA contacts, gas permeable lenses were developed and released in the late 1970s and early 1980’s. RGPs were made from silicone which allowed oxygen to pass through the lenses to the eye which is essential to maintain healthy eyes. RGP contact lenses even allow more oxygen to get through than many soft contact lenses. In addition, RGP contact lenses more comfortable to wear. RGP contact lenses are durable and resistant to protein deposits and they are easier to clean and last longer.

RGP contact lenses are worn by people that suffer from such conditions as astigmatism. Astigmatism is an eye condition that results in blurred vision. The eye\’s cornea of a person with astigmatism has an irregular curve. When a person has astigmatism, when the light rays enter the eye they do not focus correctly on the retina and the result is a blurred image. Astigmatism may also be caused by an irregularly shaped lens, which is located behind the cornea.

Gas permeable contact lenses use polymers which is a type of plastic. These polymers are permeable which means they allow oxygen to reach the eye. By doing so, it prevents the risk of new blood vessels appearing in the eye which obscures vision. In addition, the rigidity of RGP lenses does not permit them to be distorted by the astigmatic cornea. The RGP lenses actually make the cornea conform to their shape which corrects corneal distortion. For mild to moderate astigmatism, RGP lenses are placed on the astigmatic cornea and the surface of the cornea is filled up by tears. This layer of tears becomes a tear lens. This tear lens functions to correct the astigmatism.

RGP Contact Lenses are popular with people who are concerned about the quality of their vision. Some people with astigmatism don\’t get good results with soft contacts so they switch to RGP contacts for better visual acuity. People with presbyopia choose GP lenses because GP lenses come in various bifocal and multifocal designs. Many people discover that combining near and distance acuity is obtained with GP bifocals. People who have a condition called keratoconus in which the cornea is cone-shaped and causes extensive visual distortion will wear GP contact lenses

RGP contact lenses are comfortable and correct various vision conditions. They have become very popular with millions of people now wearing them. You can get cheap RGP contact lenses online at prices that are much less than prices at traditional contact lens retailers. When you shop at a quality, reputable, and established online contact lens retailer, you will have a wide variety of choices so you are sure to get the RGP contacts that you need to correct your vision condition. You will just need to provide the correct and recent prescription for the contacts when you place your order. Even if you are on a tight budget, you can get brand name RGP contact lenses at very affordable prices when you shop online.

Whatever your vision care needs, get the contact lens you\’re looking for, in a range of styles and prices.

Whatever your vision care needs, get the contact lens you\’re looking for, in a range of styles and prices.
http://www.clearlycontacts.co.nz

Author Bio: Whatever your vision care needs, get the contact lens you\’re looking for, in a range of styles and prices.

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