Pete...

Optic nerves from each eye project into each hemisphere in the occipital lobes. The optic nerve from each eye crosses over into the contralateral hemisphere at the optic chiasm. The eye is for neurologic purposes a hemisphere itself that is divided into left, right, upper and lower quadrants. Each quadrant has representation in the occipital lobes. The processing of basic sensory information may be performed in varios other areas of the cortex...the projections from the occipiatl lobes lead in many directions. Whether and what the "right hemisphere" of the brain has to do with composing an image is complicated beyond the simple notions of right brain dominance over non-verbal function...

Yours,

Robb Reed