SKIASCOPY, ■— •»•,■ 



Practical Application to the Study of Refraction. 



By EDWARD JACKSON, A.M., M.D., 



Professor of Diseases of the Eye ii 



Skiascopy is the most accurate objective method of measuring 

 refraction, and the one with which it is easiest to obtain a practical 

 working acquaintance. This book gives the clearest, most complete, 

 and most practical account of it yet published. 



, and its practical ap- j 



> 



superfluous matter, at least for those who j 



i. 

 ■ ■:' ■:•.:.- ■: .-.•:' "'.•:■'.-' 

 Even one who has some,' 

 experience in the latter will find informa- j 

 tion and many useful hints. " — - Irchives of 

 Opthalmology. 



"An excellent expose" of the underlying ! 



'Bears the stamp of personal expe- 

 nce and original observation, and can- 

 : be too highly r 



; thoroughly familia: 

 1 practice of skiasco 



subject with which 





one so full of pra 



at it. slum] I be studio 





"The description of the I 

 expressed, and the author writes with all 



| ' 'The work as a whole is very creditable ; 





-OO, POSTPAID. 



THE EDWARDS fir DOCKER CO., 



518 and 520 fllNOR ST., PHILADELPHIA. 



