186 W. B. Rogers on Binocular Vision. 
92. 93. 
The association of unequal vertical rotation of the eyes with 
their ordinary aegis adjustment occurs in viewing an ob- 
jec ct very much to the right or left of the medial line of vis- 
ion. Thus waite I hold a straight wire in a vertical position 
on the extreme left, and direct my view to the wall at some dis- 
tance behind it, I see two unequal pictures of it on that surface 
, as reieited | in fig. 94, the right hand or longerlinebe- % 9 
ing that proper to the nearer or left eye and the other that 
proper to the right eye. It is obvious that to see the 
wire single while in this position the same optical adjust- 
~) 
u 
cal rotations differing for the two eyes either in amount 
or direction are as necessary in this case as in prece- 
ding experiments. > ° 
In referring to the results of ie vision as related to the 
s 
aang objects would appear single only when the optic axes 
prare | forwards,” &c. (Philos. Trans., 1838.) Sir D. Brew 
Dilieae that the too vata e images are walle a euracka mn 
single pe nm which is produced. ‘The sense of binocular a 
di be these combinations is also in favor of this vieW- 
t to the conditions of the binocular coincidence pet : 
ed in these combinations, I conclude from the preceding ob- 4 
0g 
