Page 926 - Atlas of Histology with Functional Correlations

FIGURE 22.10 | Section of Posterior Eyeball

Showing Retina with Fovea Depression

At the posterior region of the eyeball, there is a shallow depression, or an
indentation called the fovea. Here, the retina does not exhibit any blood vessels,

the retinal layers are reduced, and almost all photoreceptor cells are cones. On
each side of the depression are visible more expanded retinal layers. The dense-
staining ganglion cells (1), the inner nuclear layer (2), the outer nuclear layer

(3), and the pigment epithelium (8) adjacent to choroid (4) layer are visible.
Similarly, the inner plexiform layer (5), outer plexiform layer (6), and the
photoreceptors rods and cones (7) adjacent to the pigment epithelium (8) are
also visible. Surrounding the periphery of the eyeball is the sclera (9).

FIGURE 22.10 ■ A section of posterior eyeball showing the retina with a fovea
depression. Stain: hematoxylin and eosin. ×17.

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