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.
An adult male human is a man, but when age is not a crucial factor, both terms can be interchangeable, e.g., 'boys and their toys' applies equally to adults and young boys, just as 'Are you mice or men?' can also apply to young boys.