<s>
A	O
cheiroscope	B-Algorithm
(	O
also	O
:	O
chiroscope	O
)	O
is	O
an	O
optical	O
device	O
consisting	O
of	O
a	O
viewing	O
instrument	O
equipped	O
with	O
a	O
drawing	O
pad	O
,	O
with	O
the	O
viewing	O
instrument	O
set	O
up	O
as	O
a	O
haploscope	O
that	O
blends	O
a	O
left	O
and/or	O
right	O
image	O
into	O
view	O
over	O
the	O
drawing	O
.	O
</s>
<s>
The	O
cheiroscope	B-Algorithm
was	O
presented	O
in	O
an	O
article	O
published	O
in	O
1929	O
.	O
</s>
<s>
"[t]he	O
cheiroscope	B-Algorithm
approaches	O
the	O
problem	O
from	O
a	O
different	O
and	O
complementary	O
angle	O
,	O
on	O
the	O
simple	O
principle	O
of	O
pressing	O
the	O
hand	O
into	O
service	O
to	O
educate	O
the	O
eye.	O
"	O
</s>
<s>
A	O
cheiroscope	B-Algorithm
can	O
be	O
operated	O
in	O
different	O
manners	O
.	O
</s>
<s>
For	O
example	O
,	O
using	O
a	O
cheiroscope	B-Algorithm
,	O
a	O
line	O
image	O
can	O
be	O
presented	O
to	O
one	O
eye	O
and	O
the	O
image	O
of	O
a	O
blank	O
sheet	O
to	O
the	O
other	O
eye	O
,	O
and	O
the	O
subject	O
is	O
intended	O
to	O
make	O
a	O
drawing	O
that	O
reproduces	O
the	O
line	O
image	O
.	O
</s>
<s>
The	O
cheiroscope	B-Algorithm
is	O
used	O
for	O
diagnostic	O
purposes	O
to	O
test	O
binocular	B-Algorithm
vision	I-Algorithm
,	O
to	O
assess	O
certain	O
conditions	O
of	O
strabism	O
in	O
particular	O
related	O
to	O
binocular	O
stability	O
and	O
alignment	O
,	O
cyclotropia	O
,	O
and	O
the	O
presence	O
and	O
extent	O
of	O
suppression	O
.	O
</s>
<s>
A	O
stereoscope	B-Algorithm
can	O
be	O
modified	O
to	O
function	O
as	O
a	O
cheiroscope	B-Algorithm
.	O
</s>
