r 531 ] 
©«t this inffrument, and introduces another of the {nape 
of a narrow lancet, made round at the point, fixed in a 
handle : with the cutting Tides of this he enlarges the 
opening. Taking out this, he introduces a pair of 
Crooked fciffars, inlarges the opening on each fide by 
different fnips, always as near as he can to the cir- 
cumference of the cornea tranfparens , until he has 
made the opening round two thirds of the cornea 
tranfparens : He then takes out the fciffars, and, 
with a fm'all inftrument like an ear-picker, he raifes 
the cornea , and having in his right hand a cataradt- 
needle, broader and ftronger than the common, and 
pointed like a lancet, he cuts the capfula of the cryf- 
talline thro’ the pupil ; then, preffing gently the 
globe of the eye with his finger from below upwards, 
the cryftalline flips out of the capfula , and drops out 
of the eye. 
Upon the firft pundture, the aqueous humour com- 
ing out, the cornea and iris join together : and it re- 
quires great dexterity, and a very fleady hand, to 
introduce the inflruments fo as not to wound the iris, 
which would endanger the eye. 
Tho’ the operation lafted above two minutes, the 
patient, to my great furprize, never complained of 
any pain ; and, upon my afking him, he faid, he felt 
nothing but a tickling. By which it appears the cornea 
is not much more fenfible than the nail of one’s 
finger. And this operation, which feerns fo cruel to 
a by-ffander, does not give fo much pain as couch- 
ing in the ufual manner. It is to be preferr’d to 
couching in many refpe&s. It may be performed 
at all times, and in all kinds of cataradts, whether 
they are come to maturity or not. Moreover one 
avoids many inconveniencies and accidents, which 
Kxx 2 often 
