This unscientific but fun timed eye test asks viewers to guess which square is a slightly different shade than the others. Prepare for a minute or so of eye-melting challenge! Read the rest
from Boing Boing http://ift.tt/1SKGUZ0
via IFTTT
This unscientific but fun timed eye test asks viewers to guess which square is a slightly different shade than the others. Prepare for a minute or so of eye-melting challenge! Read the rest
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