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TUNICA VASCULOSA, BY PROF. A. IWANOFF. 



form of extremely fine fasciculi, which are lost amongst the 

 pigment cells in the stroma of the ciliary body. 



The further course of these fasciculi can only be followed on 

 the temporal and nasal sides of the choroid, where, united 

 into two fasciculi, they lie on either side of the long ciliary 

 arteries. 



H. Muller observed that in many eyes these fasciculi not 

 only accompany the ciliary arteries throughout their whole 

 length, but also accompany them for some distance in the 

 scleral canal. 



Fig. 363. 



Fig. 363. Section of the ciliary region of a hypermetropic (long or 

 far-sighted) eye. 



The ciliary muscle was discovered in 1846, by Briicke,* and soon 

 after, independently, by Todd and Bowman. Briicke and Todd and 

 Bowman only described the meridianal fasciculi. 



The most complete description of the muscle was given by H. 

 MiUler,f in the year 1857. In this essay he first described the 

 circular fasciculi running parallel to the border of the cornea, which 

 constitute the anterior and inner portion of the ciliary muscle ; and 

 were termed by him the compressor lentis. Coincidently ArltJ also 

 discovered the circular fibres of this muscle, and described them as being 

 only processes of the radiating fibres. 



Finally, in the year 1867, F. E. Schulze discovered, with the aid of 



* Midler's ArcMv, 1846. 



t Archw fiir Ophthalmologie, Band iii. 



J Archiv fur Mikroskop. Anatomic, Band iii., p. 477. 



