The retina
We promised last week that we’d discuss the retina in more detail. One can describe the retina as the nervous coat on the inside of the eyeball. The optic nerve arrives on the inside of the eye’s posterior chamber (remember that the eyeball is divided into two main cavities). There, the fibres of the optic nerve spread out in all directions to form the retina. In the retina are absorptive pigment cells which prevent the diffusion or reflection of light within the eyeball. In the retina are tiny structures known as rods and cones.
The rods and cones receive rays of light and colours, then convey the sensations of light
