386 



ANATOMY IN A NUTSHELL. 



The ciliary body consists of the ciliary processes and the ciliary muscle. 

 The ciliary processes are of the same structure as the rest of the choroid. They 

 are a series of folds (seventy or eighty) which are derived from the anterior 

 margin of the choroid and are received in the corresponding folds of the sus- 

 pensory Ligament of the lens and the vitreous humor. The blood supply is the 

 anterior ciliary. The ciliary muscle consists of two sets of involuntary muscular 

 fibers, radiating and circular. It has a circular band one-eighth of an inch wide 

 on the outer surface of the choroid in front. The radiating fibers are more 

 numerous and more external arising from the sclerotic close to the junction of 

 the sclerotic and the cornea, between the spaces of Fontana and the canal of 

 Schlemn and pass backward to be inserted in the choroid opposite the ciliary 

 processes. The circular fibers are internal to the radiating at the base of the 

 ciliary processes surrounding the iris. 



PLATE CCII I. 



NASAL. 



SUPRAORBITAL 



TEMPORAL yC^f 

 BRANCHES ^^T^f 



LACHRYMAL 



ARTERIA CENTRALIS RETINAE. 



OPHTHALMIC. 



ANT. ETHMOIDAL. 



POST. ETHMOIDAL. 



INTERNAL CAROTID. 



Distribution of Ophthalmic Artery. 



The iris is a thin, fibrous, and contractile circular membrane which gives 

 color to the eye. It is suspended in the aqueous humor between the cornea in 

 front and the lens behind. The pupil is an aperature in its center. It is con- 

 tinuous at the circumference with the choroid and anterior to this it is connect- 

 ed to the cornea by the pillars of the iris or Ligamentum pectination. It is also 

 connected to the ciliary muscle. The uvea or the posterior surface is marked 



