Photokeratitis is another condition associated with the replica oakley sunglasses. Defined as the burning of the cornea (the clear front surface of the eye) by UVB rays, it is also known as snow blindness and typically occurs at high altitudes on highly reflective snow, thus people that ski would be more susceptible to getting the condition. Pterygium is a condition which can be defined as a raised, triangular or wedge-shaped growth of conjunctival tissue which grows replica oakleys over the surface of the cornea and can be caused by long-term exposure to sunlight, especially UV rays. Various eye cancers can also be attributed to excessive over exposure to UV rays in sunlight.