Difference between revisions of "Category:Incomplete explanations"

This seems almost impossible but it is in fact theSniper Vision System reality of the cornea. It has no direct internal supply of oxygen. Therefore, the cornea must rely on outside or atmospheric oxygen to remain healthy. To accommodate this phenomenon contact lenses are made from various porous materials. These pores, created by the gaps in the interlacing of the various types of plastic polymers, allow oxygen to be transmitted through the contact lens to reach the cornea. Oxygen diffused through tears is also important but it is less contributory than that which comes from the atmosphere.

Each time you place a contact lens on your eye, tears immediately begin to coat the lens. Human tears are necessary to keep the eye moist, clean, and clear. Tears contain lipids and more than 50 different proteins. These lipids and proteins immediately begin to fill the porous surface of the contact lens, the same pores that were originally designed to allow for the oxygenation of the cornea. When wearing the same lens over and over again what you will see happening is that the pores of the contact lens begin to clog up with natural tear components.

Over time, this process will decrease and eventually severely limit the transmission of oxygen to the cornea. When looking at the lenses at the end of a day's wear, one can see that the lens is coated with debris and will require some physical rubbing to dislodge this debris. Once rinsed the debris will have been decreased on the surface but with little to no effect on the debris lodged in the pores.

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