DISEASES OF THE CORNEA 109 



ulceration does not occur, nor does purulent disintegra- 

 tion follow, as in the superficial types of keratitis. 



The general symptoms of keratitis accompany the 

 interstitial type — viz., pain, lacrimation, and photo- 

 phobia. In severe cases iritis and inflammation of 

 other portions of the uveal tract occur. The fellow eye 

 becomes involved sooner or later, and when syphihs is 

 the cause the knee-joints may become swollen and 

 tender to pressure. 



Treatment. — When caused by specific disease, consti- 

 tutional treatment must be employed. Locally, relieve 

 the eye of any undue irritation from strong light, etc. 

 Atropin should be employed to give the accommodation 

 rest and relieve or counteract a possible attack of iritis. 

 Should iritis arise, dionin may be used in conjunction 

 with atropin, and later the yellow oxid of mercury 

 ointment added to this treatment, to promote absorp- 

 tion and assist in clearing the cornea of remaining 

 opacities. Should conjunctivitis exist, as it often does 

 in the case of distemper, this should be treated on gen- 

 eral principles. 



