The retina is a thin layer of tissue that lines the back of the eye on the inside. It is located near the optic nerve. The purpose of the retina is to receive light that the lens has focused, convert the light into neural signals, and send these signals on to the brain for visual recognition. The two layers of the optic cup will further differentiate into the retina of the mature eye. ... The outer layer of the posterior 4/5 will become the pigment layer of the retina, and the inner one will become the neural retina.
2. 2 divisions of optic cup
•Orbital part of retina - larger, thicker,
posterior part
•Ciliary and iridial parts of retina -
thinner, anterior part
3. 2 layers of optic cup
•The outer layer of the optic cup is known as the pigmented
layer of the retina.
•Development of the inner neural layer of the optic cup is more
complicated.
•The posterior four-fifths, cells of the pars optica retinae,
differentiate into light-receptive elements, rods and cones.
•Adjacent to this photoreceptive layer is the mantle layer,
which gives rise to neurons and supporting cells, including the
outer nuclear layer, inner nuclear layer and ganglion cell layer.
•The space between pigmented and nervous layers is called the
interretinal space that represents the original cavity of optic
cup.
