VETERINARY OPHTHALMOLOGY. 33 



Will just mention here a drooping of the lid, due either 

 to partial or complete paralysis of the levator palpebrse 

 superioris. Is called Ptosis. If you should desire to 

 correct, remove an elliptical portion of the skin and 

 muscular fibers, and suture. (See Figs. 16 and 17). 

 There is another condition which may be met with, 

 called Blepharospasmus, and it is a spasmodic closure 

 of the lids. May be due to a foreign body, ulcus cornese, 

 iritis. Carious teeth. May be tonic ; or clonic, lasting 

 Lut a few seconds at a time. Remove the cause of irri- 

 tation, which is the only treatment. Another rarety, 

 called nictitation, which is a constant blinking, may be 

 ■due to some irritation in the eye, or of a reflex 

 character, from worms, decayfed teeth, etc. Remove 

 cause. 



Blepharophimosis is a narrowing of the palpebral 

 opening, usually the result of chronic trachoma, and can 

 be relieved by canthotomy, performed by inserting 

 blunt pointed scissors in outer canthus and snipping as 

 far as desired. 



Trichiasis and DisticMasis. — The first is an irregu- 

 larity in shape and disposition of the cilia. The second 

 is a double row of cilia. 



Tkbatment : epilation. 



Entropium is an inversion of the eyelid, spasmodic 



and cicatricial. First usually in the lower lids ; comes 



from keratitis, foreign bodies, etc. Second is the result 



of granular and diphtheritic conjunctivitis, burns, etc., 



3 



