How Do We See?
Seeing is a physiological process differentiating shapes and colours of beings with eye or an eye like organ. The biological response living beings show to light stimulations is called photoreception. Photoreception is a mechanism launched by light sensitive photoreceptors in the eye with sensing the light.
A light beam reflected from an object reaches rods and cones in the eye retina and is transformed into an electrical stimulation. This stimulation is then transferred to the brain cortex, transforming into the image of the object. Colour, mobility and sharpness are transferred from photoreceptors to the brain cortex and are defined as vision. These electrical stimulations form rods and cones unite in the optic nerve and are tranmitted to brain.
Each eye has got 1 optic nerve crossing each other entering the brain. That means the image we see on the right side is transmitted to the left side of our brain and vice versa. These transmissions are interpreted in the occipital lobe of our brain. If the object contains motion them the image will be interpreted in the pariteal lobe.
A mistransmission in one or few of the ways will interrupt seeing