374 DISORDERS 



parts and technical terms are included) can 

 afford but very flender intelligence to the lite- 

 rary inquirer 5 as fuch a wonderful variety of 

 minute diftinc^tions cannot be comprehended 

 by defcription, a juft and' accurate difcrimina- 

 tion of parts being only to be acquired by at- 

 tentive and repeated diiledions. 



We fliall, therefore, for the advantage of 

 general comprehenfion, coniider the eye in its 

 external appearance only, with the dlfeaies 

 and injuries to which it is liable, reverting oc- 

 eafionally to the great delicacy of its flrudure, 

 ilrid the exquifite fenfibility of the parts that 

 conflitute the whole. This fuperficial defcripr 

 tion, taken into confideraticn, becomes diveft- 

 ed of technical jargon, and diftinftly compre- 

 hended by every individual in poffeflion of 

 the blefling of fight; upon wl-ich baiis may 

 be formed a very fair idea, blending an occa- 

 fional reference to their own fenfations; with 

 fuch explanations as will be introduced to 

 make the different degrees of difeafe iufiiciently 

 underftood. 



Previous to every additional obfervation, it 

 becomes indifpenfably necellary to introduce 



ibme 



