<s>
Alternating	B-Algorithm
occlusion	I-Algorithm
training	I-Algorithm
,	O
also	O
referred	O
to	O
as	O
electronic	O
rapid	O
alternate	O
occlusion	O
,	O
is	O
an	O
approach	O
to	O
amblyopia	O
and	O
to	O
intermittent	O
central	O
suppression	O
in	O
vision	O
therapy	O
,	O
in	O
which	O
electronic	O
devices	O
such	O
as	O
programmable	O
shutter	B-Algorithm
glasses	I-Algorithm
or	I-Algorithm
goggles	I-Algorithm
are	O
used	O
to	O
block	O
the	O
field	O
of	O
view	O
of	O
one	O
eye	O
in	O
rapid	O
alternation	O
.	O
</s>
<s>
When	O
performing	O
alternating	B-Algorithm
occlusion	I-Algorithm
training	I-Algorithm
,	O
the	O
person	O
wears	O
the	O
occlusion	O
goggles	O
continuously	O
for	O
several	O
hours	O
while	O
performing	O
regular	O
everyday	O
activities	O
.	O
</s>
<s>
The	O
aim	O
is	O
to	O
circumvent	O
the	O
tendency	O
to	O
suppress	O
the	O
field	O
of	O
view	O
of	O
the	O
weaker	O
eye	O
and	O
to	O
train	O
the	O
capacity	O
for	O
binocular	B-Algorithm
vision	I-Algorithm
.	O
</s>
<s>
The	O
flicker	O
rates	O
at	O
which	O
the	O
occlusion	O
is	O
alternated	O
between	O
the	O
two	O
eyes	O
in	O
alternating	B-Algorithm
occlusion	I-Algorithm
training	I-Algorithm
are	O
generally	O
much	O
slower	O
than	O
those	O
employed	O
by	O
the	O
widespread	O
active	O
shutter	O
3D	O
glasses	O
for	O
viewing	O
3D	O
television	O
or	O
cinema	O
.	O
</s>
<s>
Experiments	O
on	O
kittens	O
that	O
were	O
published	O
1965	O
by	O
Hubel	O
and	O
Wiesel	O
showed	O
that	O
continuously	O
submitting	O
kittens	O
at	O
a	O
young	O
age	O
to	O
a	O
protocol	O
under	O
which	O
the	O
eyes	O
were	O
alternatingly	O
occluded	O
on	O
a	O
day-by-day	O
basis	O
over	O
a	O
prolonged	O
period	O
of	O
time	O
led	O
to	O
changes	O
in	O
the	O
visual	O
cortex	O
,	O
in	O
particular	O
a	O
disruption	O
in	O
cellular	O
connections	O
that	O
would	O
normally	O
enable	O
binocular	B-Algorithm
vision	I-Algorithm
.	O
</s>
<s>
Experiments	O
with	O
rearing	O
young	O
kittens	O
under	O
rapidly	O
alternating	O
monocular	O
occlusion	O
using	O
constantly-worn	O
electronic	O
goggles	O
showed	O
that	O
cortical	O
binocularity	B-Algorithm
was	O
reduced	O
if	O
the	O
flicker	O
rate	O
was	O
2Hz	O
or	O
lower	O
,	O
and	O
that	O
binocularity	B-Algorithm
developed	O
normally	O
if	O
it	O
was	O
2.5	O
or	O
3	O
or	O
5Hz	O
.	O
</s>
