208 Dr. Hosack’s Observations on Vision. 
so named from their direction, (see Tab. XV III. fig- 1) A A 
A A, the tendons of the recti muscles, where they are inserted 
into the sclerotic coat, at the anterior part of the eye. B, the 
superior oblique, or trochlearis, as sometimes called, from its 
passing through the loop or pulley connected to the lower 
angle of the orbiter notch in the os frontis ; it passes under 
the superior rectus muscle, and backwards to the posteiior 
part of the eye, where it is inserted by a broad flat tendon 
into the sclerotic coat. C, the inferior oblique, arising tendi- 
nous from the edge of the orbiter process of the superior max- 
illary bone, passes strong and fleshy over the inferior rectus, 
and backwards under the abductor to the posterior part of the 
eye, where it is also inserted by a broad flat tendon mto the 
sclerotic coat. D D D, the fat in which the eye is lodged. In 
fig. 2 . we have removed the bones forming the external side of 
the orbit, with a portion of the fat, by which we have a dis- 
tinct view of the abductor.. ABC, three of the recti muscles, 
arising from the back part of the orbit, passing strong, broad, 
and fleshy over the ball of the eye, and inserted by flat, broad 
tendons into the sclerotic coat, at its anterior part. D, the 
tendon of the superior oblique muscle. E, the inferior oblique, 
fig. 3. A, the abductor of the eye. B, the fleshy belly of 
the superior oblique, arising strong, tendinous, and fleshy from 
the back part of the orbit. C, the optic nerve. D and E, the 
recti muscles. 
The use ascribed to these different muscles, is that of chang- 
ing the direction of the eye, to turn it upwards, downwards, 
laterally, or in any of the intermediate directions, accom- 
modated either to the different situation of objects, or to ex- 
press the different passions of the mind, for which they are 
