How does laser vision correction work?

Laser vision correction works by using a high precision laser beam to reshape the front surface of the cornea and allow light rays to focus precisely on the retina. This high precision laser known as Excimer Laser involves the use of 193 nm UV light, which is a unique type of “cold” laser that does not burn or cut tissue. Instead, it gently breaks the molecular bonds between the cells so that controlled amounts of tissue can be literally vaporized away, one microscopic layer at a time. Central tissue is removed to reduce the corneal curvature and correct nearsightedness. Peripheral tissue is removed to increase the corneal curvature and correct farsightedness. Astigmatism can be corrected by removing selected tissue to even out the curvature of the cornea.