MUSCLES OF THE EYE
This can be either intrinsic or extrinsic (Sambasivan et al., 2011).
9.4.1 Extrinsic Muscles
These are also termed extra-ocular muscles and include the inferior rectus (IR); medial rectus (MR); superior oblique (SO); levator palpebrae (LP); superior rectus (SR); lateral rectus (LR); and retractor bulbi (RB).
They are derived from the cranial mesoderm and are responsible for the bulk of ocular motions (Sambasivan et al., 2009).9.4.2 Intrinsic Muscles
Sphincter pupillae, dilator pupillae, and ciliaris (Dimitrova et al., 2009).
9.4.3 Innervation of the Eye
The innervation for the eye can be for vision, supplied by the optic nerve (Cranial nerve II) or for ocular movements, carried out by oculomotor (Cranial nerve III), trochlear (Cranial nerve IV), and abducens (Cranial nerve VI) (Kur et al., 2012).
9.4.4 Blood Supply
Ophthalmic artery and vorticose vein, a branch of the ophthalmic vein (Flammer et al., 2013)
9.5