PREVENTION, SYMPTOMS AND TREATMENT IO c 



After isolation of a suspected animal — and a cow barn is a 

 suitable place — the most thorough cleansing and disinfection of the 

 infected premises must be undertaken. The harness, utensils, stable 

 fittings, mangers, walls, floors and every possible object which may 

 have been contaminated by discharge must be cleaned with soap and 

 boiling water and 5 per cent, carbolic acid solution, and painted or 

 whitewashed (containing 5 per cent, carbolic acid), and the premises 

 thoroughly disinfected with sulphur or formaldehyde (see Vet. Mat. 

 Med., p. 725) and aired before they are occupied again by horses. 



Glaucoma. 



This is a condition where either the flow of lymph into, or the 

 drainage from, the humors of the eye are impaired and the result is 

 hardening of the eyeball and pressure on the vessels and nerve of 

 the eye. In the acute form there is an active, painful congestion of 

 the visible eyeball, with enlarged pupil which reacts poorly to light, 

 shallow anterior chamber, a steamy-looking, somewhat anesthetic 

 cornea, and, above all, marked hardening (increased tension) of the 

 affected eyeball on palpation. 



In the acute stage, a smart purge should be given, and the diet 

 must be restricted, while a solution of eserine sulphate (gr. iv-§i) 

 should be dropped on to the eyeball thrice daily. Iridectomy is, 

 however, the most useful treatment between attacks, or during an 

 acute attack if required. It is well to employ a milder solution be- 

 tween the attacks to sustain contraction of the pupil for some time 

 (eserine gr. ss to %\). 



'A chronic form occurs in which there is failure of vision with 

 increased intraocular tension on palpation, but without inflammatory 

 signs. 



Secondary glaucoma follows injuries and ulcers of the cornea, 

 iritis, injuries of the lens and traumatic cataract, and intraocular 

 growths. The treatment is mainly surgical, as iridectomy, extrac- 

 tion of the lens,*or enucleation of the eyeball. 



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