THE VITREOUS BODY. 



621 



hyaloid, being opposite to the ciliary processes, differs from tlie rest in 

 the fact that instead of presenting a smooth and even surfoce, it 

 exhibits, when separated, small, regular Md&— processus ciUayes zonidcn — 



Fig. 431. 



Fig 431. — Sectional view of the Connections of the Cornea, Sclerotic, Iris, 

 Ciliary Muscle, Ciliary Processes, Hyaloid Membrane and Lens. \ 



The specimen extends from tlie mitldle of the lens to the era serrata on the inner side 

 of the right eye. C, cornea ; cs, conjunctiva ; ce, epithelium of the conjunctiva ; dp, 

 posterior elastic layer ; le, ligamentum pectinatum iridis ; S, sclerotic ; A, the aqueous 

 chamber ; up, the recess forming the posterior division of the aqueous chamber : SV, canal 

 of Schlemm ; ir, radiating muscle of the ins ; io, divided fibres of the sphincter muscle ; 

 u, pigment layer or uvea ; In, centre of the crystalline lens ; /c, capsule of the lens ; Ice, 

 layer of cells in front of the lens ; clr, radiating ciliarj' muscle ; cio, divided annular 

 fibres ; cip, ciliary process ; Ch, choroid ; R, retina ; o, ora serrata ; re, the ciliary part 

 of the retina ; /*, hyaloid membrane ; P, canal of Petit ; Z, zonule of Zinn; U, suspensory 

 ligament of the lens proceeding from the hyaloid covering the ciliary process towards 

 the front of the capsule of the lens ; am, anterior margin of the vitreous humour, V. 



(in the intervals of which a small amount of pigment commonly remains 

 attached): these fit closely into the intervals between the true ciliary pro- 

 cesses. Between the last named and the lens the ligament is free from 

 jilaits, and forms part of the posterior boundary of the aqueous chamber. 

 Its posterior surface is turned towards the vitreous humour, but is sepa- 

 rated from the latter near the lens by a zonular space, triangular in 

 section, named the canal of Petit (fig. 431, p). During life, in all 

 probability, the vitreous humour extends into and almost or entirely 

 occupies this space ; but after death it may be injected with fluid or 

 distended with air : if this be done after removal of the anterior parts 

 which support and enclose it, the folds of the suspensory ligament on 

 its front are distended, and the canal presents a sacculated appearance, 

 as in fig. 432. 



