52 



232. Model of the human eye and eyelids, enlarged. 

 Exhibited by P. Zeiller, Munich. 1879. Price 31. Ws. 



The upper eyelid lifts off, and shows on its under surface the 

 lachrymal gland with its ducts. On the eyeball are the stumps 

 of the muscles. On lifting up the top half of the sclerotic the 

 choroid with its vessels is exposed, and this in its turn reveals 

 the vitreous body and the lens ; the iris is removable from its 

 groove in the anterior part of the sclerotic. To the inner side 

 of the eyeball are the caruncle, the lachrymal ducts, and the 

 expanded upper end of the nasal duct. 



The whole is mounted on a wooden stand, with descriptive 

 text in a drawer. 



233. An enlarged model of the human eye dissected 

 and lying in its orbit. 



From the Pedagogical Museum, St. Petersburg. 

 E. 674. 1877. 



As the model lies in the case it is inverted, the lower half of 

 the wall having been removed. The long walls of the sides, 

 back, and roof of the orbit are shown, and in front the palpebral 

 muscle can be removed. The retina, optic nerve, lens, and 

 choroid coat can be lifted out from the sclerotic, to which the 

 internal, external, and superior rectus muscles are seen to be 

 attached. 



234. Enlarged model of the human eye-ball. Made 

 by Ramme and Soldtmann, Hamburg. 



Exhibited by G. Gill fy Co. 1878. Price 28s. 9d. 



The sclerotic to which the stumps of the muscles are attached 

 can be lifted off, exposing the choroid and iris. The upj er half 

 of this with the included vitreous body can be removed, leaving 

 the lens and the lower half of the vitreous. 



On the back of the vitreous body an attempt has been made 

 to show the layers of the retina, 



235. Model of the hum^n eye in its orbit, enlarged. 



Made by Ramme and Sodtmann, Hamburg. 

 E. 40. 1880. 



The eyelids can be taken off the centre of the stand ; the 

 upper part of the eyeball can be lifted off, and then the iris and 

 choroid coats separated. The retina is painted on the outer- 

 surface of a glass representation of the vitreous body, to the 

 front of which the lens is cemented. 



