( 373 ) 



CLASS xr. 



DISORDERS OF the EYES. 



There is no one part of this tradt more 

 entitled to ferious inveftlgation than the fub- 

 jedl now before us ; for as no blemifh or de- 

 fed: can take fo much from the original value 

 of a horfe as the lofs of his eyes, fo it un- 

 luckily happens there are few cafes lefs un- 

 derftood or more improperly treated. The 

 rays of information can be but trifling to the 

 general reader, from a dull anatomical defcrip- 

 tion of the gloie, tunica coj-nea y the aqueous, 

 cryjlalline^ and vitreous humour s\ the diftindl 

 anterior or pofterior chambers ; the adlion of 

 the mufcles or the optic Jierve. The elaborate 

 fludy of fo complicate and delicate a ftrudlure 

 (in the formation of which fuch an infinity of 

 B b 3 parts 



