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Both the eyes, in which the operation fail’d, were 
deftroy’d by the fubfequent inflammation : but, to do 
juftice to this new operation, I might here take no- 
tice, with regard to the cafe of A B , that the ill 
fuccefs was partly owing to the imperfection of my 
inftrument ; a difadvantage, that muft frequently at- 
tend on the execution of new attempts. It was the 
flrfl operation I performed, and I had provided a 
knife with fo thin a blade, that, after I had pafled 
through the cornea into the anterior chamber of the 
eye, the point was fo blunted, that, upon endeavour- 
ing to carry it through the cornea out on the other 
fide, the blade bent, and I was apprehenfive it might 
break : however, withdrawing it a little, I made two 
or three efforts, and fucceeded in the incifion, and 
the removal of the cataradt. 
During this operation, the aqueous humour being 
difeharged, and the patient ftruggling, I wounded 
the iris ; which bled profufely, and continued for 
feveral days to difeharge a great quantity of blood, 
and bloody ichor : and it is to this accident that I am 
inclined to impute the mifearriage of the operation ; 
though Mr. Daviel affirms, that the wounds of the 
iris have been very feldom followed with bad effects 
in his practice. 
I have referved the mention of A K s hiftory to the 
laff, becaufe of its Angularity. She was altogether 
as blind as thofe, whofe cataradts are ripe ; but hers 
had the appearance of a beginning cataradt, being of 
a light blue, and but little opake. Upon making 
the "comprefiion, the cryflalline did not advance 
through the pupil , as in the other inflances . and I 
found, 
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