ON DISEASES OF THE EYES. 5O5 



had no experience, but I ^vill once more give a 

 caution, that before their ufe be hazarded, it be 

 well afcertained, that the defeft intended to be 

 removed be really fituate upon the outer coat 

 of the eye, lince fuch remedies can have no 

 poflible effe£l upon the internal parts, and may 

 inflame, irritate, and torture to no manner of 

 purpofe. 



Diminution of Sight from debility 

 OF THE ortgans. It IS doubtlcfs owing to 

 their various hard laborious fervices, that horfes 

 are more fubjecl to difeafes of thofe moft tender 

 and fenfible organs the eyes, than any other 

 animals ; thence perhaps alfo the fource of 

 their hereditary defe61s. Hard labour, particu- 

 larly heavy draught, and repeated violent ex- 

 ertions at dead pulls, will produce blindnefs ; 

 alfo poor and unfubftantial keep. The figns 

 are, a gradual lofs of convexity, or plumpnefs 

 in the eyes, with dullnefs, and imperfed fight at 

 intervals. If the eyes are naturally good, a 

 cure may be wrought by mending the keep of 

 the horfe, and the conftant ufe, twice a day, of 

 the Ilrcngthening faturnine collyrium prefcribed 

 in humour-blindnefs. Bathe the temples oc- 

 cafionally with diftilled vinegar and brandy 

 mixed. 



Cataract or Glaucoma, for they ap- 

 pear to be one and the fame difeafe, is a fuf- 

 fufion, or cloud upon the {mpilla, commonly 



called 



