ANATOMY OF THE EYE 



13 



and are protected by bony orbits and soft appendages. 

 They are embedded in a cushion of fat and surrounded 



Fig. 2.— Vertical axial section of orbit of horse: a, a, Eyelids; b, bulbar 

 fascia (Tenon's capsule); c, c', retractor bulbi; d, rectus oculi inferior; 

 e, obliquus oculi inferior (in cross-section); /, rectus oculi superior; g, 

 levator palpebrce superioris; h, obliquus oculi superior (in cross-section); 

 i, lacrimal gland; k, k', periorbita; /, superficial fascia; m, deep fascia; n, 

 skin; 0, retrobulbar fat; p, extra-orbital fat; q, temporalis muscle; r, supra- 

 orbital process; s, cranial wall; i, cornea; 2, sclera; 3, choroidea; 4, ciliary 

 muscle; 5, iris; 6, granula iridis; 7, retina; f, optic papilla; 8, optic nerve; 

 p, crystalline lens; 10, capsule of lens; 11, ciliary zone; 12, posterior cham- 

 ber; 13, anterior chamber; 14, conjunctiva bulbi; ij, vitreous body. 

 (After Ellenberger, in Leisering's x\tlas.) 



or, rather, encased within a capsule, in which they are 

 freely moved at will by the aid of the extrinsic muscles. 



