<Dl> <Dt> The afferent limb of the circuit </Dt> <Dd> This limb contains the main structures; the retina that contains the retinal ganglion axons in the optic nerve, chiasm and tract, the lateral geniculate body, and the visual cortex . </Dd> <Dt> The efferent limb of the circuit </Dt> <Dd> This limb includes Edinger - Westphal nucleus and the oculomotor neurons . The main function of the Edinger - Westphal nucleus is to send axons in the oculomotor nerve to control the ciliary ganglion which in turn, sends its axons in the short ciliary nerve to control the iris and the ciliary muscle of the eye . The oculomotor neurons functions to send its axons in the oculomotor nerve, to control the medial rectus, and converge the two eyes . </Dd> <Dt> Ocular motor control neurons </Dt> <Dd> Neurons that are interposed between the afferent and efferent limbs of this circuit and include the visual association cortex, which determines the image is "out - of - focus, and sends corrective signals via the internal capsule and crus cerebri to the supraoculomotor nuclei . It also includes the supraoculomotor nuclei (located immediately superior to the oculomotor nuclei) that generates motor control signals that initiate the accommodation response and sends these control signals bilaterally to the oculomotor complex . </Dd> </Dl> <Dt> The afferent limb of the circuit </Dt> <Dd> This limb contains the main structures; the retina that contains the retinal ganglion axons in the optic nerve, chiasm and tract, the lateral geniculate body, and the visual cortex . </Dd> <Dt> The efferent limb of the circuit </Dt>

Explain the role of the lens in accommodation