3%6 ESSAYS ANp OBSERVATIONS 
rable time, till, at the importunity of 
fome of my beft” friends, I confented to 
try this new operation. ~ Six cataracts 
luckily caft up laft fummer in the Royal 
Infirmary at Fdinburgh, which I extra@- 
ed in the following manner, 
THE patient being feated in a chair, 
with an affiftant at his back, to fupport 
his head, and keep up his eye-lid, as in 
the old operation, the operator may ftand 
or fitin achair, as he finds moft conve- 
Dient. aA | 
He fhould keep down the under eye~ 
lid with two fingers of the one hand, 
while with the other he takes the final! 
knife A (Plate VIL Fig. 3.) with which 
he pierces the tran{parent cornea at the ex- 
ternal angle of the eye, near to where the 
cornea joins with the /fclerotica, taking 
great care not to wound the ris. Run. 
the knife in a horizontal direction acro{s 
the anterior chamber, and bring it out 
about the fame diftance from the white — 
of the eye, as where it entered; then cut — 
that part of the cornea which lies below 
the two orifices, as much in the form of 
a 
