SENSE OF SIGHT
Vision is called the ability to interpret our environment by light rays reaching the eye. The vision or sense of sight is one of the main sensory capabilities of man and many animals.
To be able to need the proper functioning of the visual system is composed of the eye, optic nerve and various brain structures.
The eye is the gateway for entering light stimuli are transformed into electrical impulses through a specialized cells of the retina are the rods and cones.
The optic nerve transmits electrical impulses generated in the retina to the brain, where they are processed in the cortex visual.1
In the brain takes place the complicated process of visual perception by which we can perceive the shape of objects, identifying distances and detect colors and movement.
The injury of one of the visual system structures can cause blindness but the rest does not present any alteration. In Cortical Blindness caused by an injury to the occipital region of the brain, there is complete loss of vision while the eye and optic nerve show no abnormality