How eye Work

How Eyes Work
imgnormaleye_large1Normal functioning of the eye; A normal eye functions like a camera. The cornea is the clear window at the front of the eye. Along with the natural lens inside the eye, the cornea works to focus light coming from a distance clearly on to the retina at the back of the eye. The retina is equivalent to the film in the camera and changes light into electrical impulses that are carried by the optic nerve to the brain. The iris (coloured part of the eye) acts like the aperture of the camera, regulating the amount of light getting in. An eye in which the light from a distance is not focused correctly on the retina has what is called a refractive error, and requires correction from either glasses or contact lenses to bring the image into focus. WA Laser Eye Centre performs various types of refractive eye surgery to correct the different types of refractive errors listed below.

imgnormaleye_large1If the cornea and lens are too strong, or if the eye is too long, then light will be focused in front of the retina. Objects in the distance are blurred but those closer are in focus. Nearly 25% of people in Australia are myopic. This usually develops while the eye is still growing during childhood or adolescence and stabilises when full growth is reached.