experience what it's like to be visually impaired, try the
Take a pair of old sunglasses and smear Vaseline on them.
Now walk around and look at different objects; pictures, faces,
patterns on the furniture, trees outside, buildings in the
distance, etc. Some people might naturally see this way and
others may see this way because of the factors listed above,
like the amount of sleep a person has had or the medication
he or she has taken.
To understand depth perception put a cup on a table and stand
about three meters away. Cover one eye and have a friend hold
a penny above the cup, but slightly in front of it. Watching
only the cup and the penny, tell your friend where to move
the penny so that it falls into the cup. Tell your friend
to drop the penny and see how you did. Would you do better
if both eyes were uncovered?
you have two eyes, both in different positions, each one sees
things at different angles. The brain compares both of the
images it receives from each eye to give you a three-dimensional
image. When you cover one eye, you're now only seeing things
in two dimensions and your ability to judge distances is impaired.
With practice though, you can improve your one-eyed depth
perception. Keep trying the penny drop test and you'll notice
that you are getting better each time.