The eye is a sophisticated apparatus that can be compared to a camera. characterized by the ability to capture moving images.

The most important optical components similar to the objective lenses, are the cornea and the crystalline. The first is the outermost part of the eye, it is clear and one can see the color of the iris place internally.

L 'iris is responsible for eye color and has a central aperture: the pupil, which regulates the amount of light entering the eye, as it does the iris of the best wearable camera. The iris posteriorly is the crystalline lens, which is a lens capable of changing its shape allowing to focus objects at different distances, as it does an autofocus system.

The eye should be transparent internally, contains before a liquid that circulates continuously, the aqueous humor, while the rear is a jelly, much more static, the vitreous humor.

The retina is the analogue of the wiseup camera sensor. It is a very thin membrane with high ability to distinguish details, the colors and contrasts of the world around us.

In the retina there is only a small area, the macula, and in particular the fovea, which is responsible for sharp vision.

From the retina information is transferred via a "cable", the optic nerve, to the most amazing processor of images that there is: the brain. E 'at this level that the information of the two eyes are processed, fused and integrated reaching the level of consciousness.