78 



MICROSCOPY OF THE LIVING EYE 



continuity with the plane of the posterior surface. Fig. 45, B, 

 shows by retroillumination a very characteristic scar of the 

 posterior face due to the former perforation by a tangentially 

 disposed broad spear-like surgical needle. 



Precipitates (" K.P.") on the posterior face of the cornea are 



Fig. 46. — A, inflammatory " nodules " at the pupillary border, and deposits 

 on the anterior lens-capsule. B, " K.P.", also pathologically increased 

 relucency of the aqueous fluid which contains numerous products of inflam- 

 mation. C, Pathological markings of the posterior corneal surface, and 

 shadow-streaks from droplets on the anterior surface. (Drawn by Theodore 

 Hamhlin, Ltd.) 



shown by direct illumination in Fig. 46, B, having been deposited 

 from the aqueous fluid in inflammation of the iris and ciliary body. 

 If the slit-lamp were used for no other purpose than the clinical 

 detection of " K.P.", its possession and efficient use by every 

 practising oculist would be justified : these fine precipitates on 

 the back of the cornea may be, and often are, the only feature 

 distinguishing intraocular from extraocular disease in those mild 



