The Lens and The Cornea are the teo parts of an eye which refract the light rays.The lens is a transparent body behind the iris, the coloured part of the eye. The lens bends light rays so that they form a clear image at the back of the eye - on the retina. As the lens is elastic, it can change shape, getting fatter to focus close objects and thinner for distant objects. It bends as it :
1. enters the cornea
2. enters the lens
3. leaves the lens