460 CLINICAL APPLIED ANATOMY. 



may form a considerable mass, which, in some cases, leads to 

 the adhesion of the whole posterior surface of the iris to the 

 anterior capsule of the lens. Part of the exudate also commonly 

 passes into the vitreous, there to form vitreous opacities ; 

 while another part may be carried through the pupil into the 

 anterior chamber. This last portion of the exudate consists 

 of conglomerations of round cells, many of which contain 

 pigment granules, and as the movements of the eye take place 

 they are thrown against the posterior surface of the cornea and 

 become deposited there. The larger cells usually fall to the 

 bottom, and the deposit has a triangular shape with its apex 

 upwards. Owing to the turbidity of the aqueous or the exudation 

 in front of the lens or in the vitreous, vision is necessarily 

 interfered with during an attack of cyclitis. Great pain is also 

 experienced when the ciliary region is palpated. The elevation 

 of the tension during the early stages of cyclitis is due to oedema 

 of the ciliary body blocking up the iridic angle, whilst the lowering 

 of tension in the later stages is to be accounted for by the 

 shrinking of the exudate. 



An iridectomy in cases of glancoma opens up the lymphatic 

 spaces in the ciliary region and allows the absorption of the 

 fluid which is causing the increased tension of the eye. 



