116 VETERINARY OPHTHALMOLOGY. 



ance is not marked, operative interfereilce is not imper- 

 ative. The horse would be a shyer after removal, as 

 the rays of light would not he focused on the retina. 

 Meclination or depression of the lens into the vitreous 

 'has been done, but it is dangerous, the lens being apt to 

 set up hyalitis, etc. 



Ectopia Lentis or dislocation of the lens, is generally 

 the result of injury. May be spontaneous and has been 

 congenital, from weakening of the zonule of Zinn. It 

 may also be complete or partial. , 



