The information about the image via the eye is transmitted to the brain along the optic nerve. Different populations of ganglion cells in the retina send information to the brain through the optic nerve. About 90% of the axons in the optic nerve go to the lateral geniculate nucleus in the thalamus.
a 'Male' is a biological term and a Man is more of a gender based term which associates with many 'manly' behaviors in different contexts.
Man is the most general and most commonly used of the three; it can be neutral, lacking either favorable or unfavorable implication: a wealthy man; a man of strong character, of unbridled appetites. It can also signify possession of the most typical or desirable masculine qualities: to take one's punishment like a man. Male emphasizes the physical or sexual characteristics of a man; it may also refer to an animal or plant: a male in his prime; two males and three females in the pack; a male of the genus Ilex.