CATARACT

The cataract is a state of opacification of the crystalline, the eye natural inner lens, that causes the progressive dimming of the eyesight. The crystalline, normally transparent, tends to become opaque due to oxidation phenomena of the proteins forming its tissue.

In a healthy eye, the light crosses the transparent crystalline lens and reaches the retina: the focalization is normal and the brain perceives sharp images. In an eye suffering from cataract, the opaque crystalline lens partially halts the passage of the rays of light, that are deviated in several directions: this prevents the normal focalization on the retina and the perception of the images is confused.