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from seeing anything near or far
through it, so long as that thing is
not larger than it is. And if the thing
is equal to and as long as the length
you can extend your two eyes,
then it will take away your ability to see
of the object, to the extent of its size,
as you can see in this third figure.
And if the thing is smaller than
the distance between your eyes, it
will take away less of your ability to
see objects both near and far,
since it is not as large as
the object you wish to see.
And the further away you hold the thing
from you, the