This picture shows a longitudinal section of the human eye. The following structures are seen (from left to right): anterior chamber, iris, posterior chamber, zonular fibres, ciliary body, musculus ciliaris, lens, outside conjunctiva, fovea, optic nerve, retina, choroid, sclera, optic nerve, optic nerve sheath, central vessels. Likewise, two extraocular muscles (superior and inferior rectus) can be seen.