THE EYE AND EYELIDS 



107 



IS also derived from allowing the escape of some of the 

 aqueous humour by the operation of tapping the cornea 

 already described. 



Strabismus, or Squint. 



Symptoms. — This deformity is not very common in veter- 

 mary patients. The eyeball may be drawn outwards (external 









Fig. 76. — Collie with Internal Squint of Each Eye.^ 



strabismus) or inwards (internal strabismus), either of which, 

 if well marked, may interfere with vision, the patient appear- 

 ing to hesitate when hurrying along or when suddenly brought 

 amongst a number of objects. 



The subject of the illustration came under observation in the Free Out- 

 Patients' Department in March, 1895, -^ the animal being a very fat collie 



' For this sketch (made from a photograph taken at the time) I am 

 indebted to Mr. C. C. Abram, M.R.C.V.S. 



^ Jourttal of Comparative Pathology and Therapeittics, vol. viii., p. 250 ; 

 Veterinary Record, vol. vii., p. 688. 



