420° J MUSCLES OF THE EYE. — 
more is necessary than to close the upper lid—not forcibly, 
however ; next to make pressure upon its upper part with a 
pencil, bodkin, knitting-needle, or other hard body of small 
{paiameter ; and then, taking hold of the eyelashes, to draw 
asa lower edge of the lid forwards and upwards. By a dex- 
*.movement of this kind, the lid may be everted without 
any palm, “~a little temporary discomfort being all that the dis- 
placement occw 9 a te . 
and any offen ding o> 3 its lining membrane is then exposed, 
~ article may be readily removed. 
no38; The lobe of HHS ye i moved by sx muses which 
skull. "All these muscles, excepiy or orbit, hollowed-out in the 
. 
into epee bit, and are inserted 
front, b “psclerotic coat, near its 
Rout: of thesrond thin tendons. 
or straight m © are termed recti 
these, the superior ~ 
209), is inserted ab 7@cms(6 Hg 
part of the eye, art 7 Urs 
quently byits contracti,”. crac 
the globe upwards ; aiyo th 
d, the imferior rectus, eter es 
Fig. 209.—Verricat SECTION oF THE duces a corresponding m > 
Pansr: ment downwards, A third, bY 
Showing the globe of the eye and its ap- ynteynal rectus (which cou 
pendages ; a, cornea; b, sclerotic ; ec, optic = ‘ d 
nerve; d, inferior rectus muscle; e, supe- not be shown in this figurett 
7 
r 
Hor reobi; f, eut extremity of theex~ rolls the globe inwards, 6 . 
oblique; h, superior oblique; i,elevator towards the nose ; whilst ay 
of the upper lid; %, lachrymal gland. fourth, the external rectus ( th tk® 
cut extremity of which is seen at), turns it outwards. Besides*~ 
these, there is a remarkable muscle, h, the superior oblique, 
which originates at the back of the orbit, comes forwards to 
the front, where its tendon passes through a pulley, and then 
turns backwards to be inserted into the sclerotic coat, at a point 
considerably behind the pulley. The sixth muscle, g, termed 
the inferior oblique, does not arise, like the rest, from the 
back of the orbit, but from its lower border. The action of 
the two oblique muscles (which act in antagonism the one to 
the other) appears to be to rotate the eyeball upon its axis ; 
as is done when the eyes are kept steadily fixed upon any 
theee® originate at the back of — 
=cles. One of : 
