<Tr> <Th> Vein </Th> <Td> Vorticose vein </Td> </Tr> <Tr> <Th> Nerve </Th> <Td> <P> short ciliary From oculomotor nerve Through ciliary ganglion </P> Sympathetic postganglionic fibers from sup . cervical ganglia . </Td> </Tr> <P> short ciliary From oculomotor nerve Through ciliary ganglion </P> <Tr> <Th> Actions </Th> <Td> 1) accommodation, 2) regulation of trabecular meshwork pore sizes </Td> </Tr>

The ciliary muscle controls the diameter of the iris