I70 OPHTHALMOLOGY EOR VETERINARIANS 



lens, it may also do no harm for a time, except to pro- 

 duce a traumatic cataract, though the lens may swell 

 and glaucomatous symptoms follow; or the lens, in young 

 subjects, may become gradually absorbed, and the body 

 will drop down, irritate the cihary body, and produce 

 cycHtis, iritis, chorioiditis, etc. 



Enucleation of the Globe. — As before stated, it is 

 better, in all hopeless cases, to enucleate the globe. 

 This is much more difhcult to do in the quadruped than 

 in man, because of the large retractor muscle. The 

 steps of the operation are as follows: 



General anesthesia should be used in all cases, as we are 

 not justified in causing the dumb beast to suffer more 

 pain than is necessary. Wash the eye and the surround- 

 ing parts with soap and water, followed by an antiseptic 

 solution. Apply the speculum, or have an assistant 

 hold the Hds open with retractors. Make an incision 

 through the conjunctiva, around the corneal margin, 

 preserving as much of the tissue as possible. Under- 

 mine the conjunctiva as far back as the insertion of the 

 muscles, keeping as close to the sclera as possible. 

 Pick up the muscles individually with the tenotomy 

 hook, and cut them, with the small curved scissors, 

 near their tendinous insertion. Cut away, gradually, 

 the insertion of the retractor muscle, then pass in the 

 strong curved scissors, grasp the optic nerve, and 

 divide it with one snip if possible. In doing this the 

 handle of the scissors must be raised, not lowered, as 



