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A critical and anatomical Examination of the Parts immediately 

 inter ejied in the Operation for a CATARACT; -with an 

 Attempt to render the Operation itfelf, whether by Deprefflon or 

 ExtraSlion, more certain and fuccefsful. By SILVESTER 

 O ' H A L L O R A N, Efq; M.R.I. A. Honorary Member of the 

 Royal College of Surgeons in Ireland, and Surgeon to the County of 

 Limerick Hofpital. Communicated by the Right Honorable the 

 £dr/ o/'CHARLEMONT, P.R.LA. 



Nullius add i^ us jurare, in verba magijiri. HoR. 





-I H O U G H it has been unanimoufly agreed on, by both Read Jan. 

 antients and moderns, that the catarad is an opaque body imme- ^' ''^^^' 

 diately behind the pupilla, oppofing the pajjage of the rays of li^ht 

 to the bottom of the eye ; and that the cure of this diforder con- 

 fifts in renmung this opacity ; yet the part immediately difcafed 

 has been for about a century the fubjed of much controverfy, 

 whilfl the operation itfelf, the moft ejjnitial point of enquiry, feems 

 as uncertain now as it was a thoufand years ago, notwithftanding, 

 the boafted improvements of M. Daviel, aijd other moderns. 



R The 



