It fills the space bounded by the lens, zonule, pars plana and neural retina. The hyaloid canal extends anteroposteriorly through it. Contains a pigment cell layer , light-sensitive photoreceptors , and nerve cells arranged in layers to partially integrate the nervous information and transmit it out of the eye to the brain. In most regions of the retina, light has to pass through the inner structures to reach the outer ones that are actually photosensitive. The reference point for 'inner' and 'outer' is the unseen vitreous , not the BL on which the pigment cells sit.
Pigment cells absorb light, and destroy the used-up tips of the rods.
Then comes a dilation with the nucleus, and further inward the cell narrows to become an inner fibre before synapsing with the dendrites of bipolar nerve cells. The condition of these vessels is a crucial part of the ophthalmoscopic examination. 3 Optic nerve - the ganglion cells' fibres acquire myelin sheaths, then run centrally with accompanying glial cells and a meningeal sheath as a CNS tract. The retinal artery and vein run centrally in the intraorbital section of the nerve. Choriocapillaris - a plexus of large capillaries.