562 SIGHT. 



vessels. These flocculi are named ciliary processes, and their use 

 is still an object of inquiry. r 



" In the bulb of the eye, whose coats we have now described, 

 are contained the humours, of three principal kinds. 



" The posterior, and by far the greater, part of the globe is 

 filled by the vitreous humour, which is in larger quantity pro- 

 portionally in the human subject, especially after puberty, than 

 in other animals, and so dispersed in innumerable drops through- 

 out the cells of the delicate hyaloid membrane that this membra- 

 naceo-lymphatic body has the singular appearance of a tremulous 



" Anteriorly it adheres to, and the zonula just mentioned sur- 

 rounds, the capsule containing the crystalline lens, immediately 

 around which lies the water of Morgagni." 



'' a, point of junction of the sclerotic and cornea. 



b, c, d, the sclerotic ; growing thicker and thicker posteriorly. 



e, opening of the sclerotic through which the optic nerve runs. 

 /, anterior surface of the crystalline lens, bounding the anterior chamber of the 

 eye. 



g, iris. 



A, anterior chamber of the eye. 



i, posterior surface of the crystalline. 



k k, anterior termination of the retina. 



l t m, fibrous covering of the optic nerve, continuous with the sclerotic. 



n, proper covering of the optic nerve. 



o, section of the optic nerve. 



"The lens, itself also very pellucid, is cellular, but so. much 

 more dense than the vitreous humour that in the hand it seems 



r " Consult, among others, Brandis, Pathologic, p. 253. 

 And J. Aug. Hegar, De Oculi partibus quibusdam. Dotting. 1818, 8vo. 

 p. 25. sqq." 



