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Posterior sclera, choroidea, retina

inner limiting membrane
nerve fiber layer
ganglion cell layer
internal plexiform layer
internal nuclear layer
external plexiform layer
external nuclear layer
external limiting membrane
layer of rods and cones
pigment cell layer

Transverse section through the retina of the eye of a pigeon (HE) (1)

The avian retina is avascular. It can be divided in a photosensitive part (pars optica retinae) and a non-photosensitive part (pars caeca retinae).

The pars optica retinae consists of two principal layers: an outer pigment cell layer and an inner sensory or nervous layer (stratum nervosum retinae), the latter subdivided into nine further layers. The pars optica retinae thus consists of: (1) the inner limiting membrane, (2) the nerve fiber layer, (3) the ganglion cell layer, (4) the internal plexiform layer, (5) the internal nuclear layer, (6) the external plexiform layer, (7) the external nuclear layer, (8) the external limiting membrane, (9) the layer of rods and cones, (10) the pigment cell layer.

Pars caeca retinae: see chapter ora serrata and scleral plate