1)The
coloured part of the eye is called the iris. There are three basic colours
–brown, blue and green. A very few albino people have red or pink eyes, but
these are very rare. In fact they are just as tough as brown eyes, although they
are more sensitive to light.
2)We only
see part of the eyeball, although the whole eye is as big as a table tennis
ball. Light enters the eye through the pupil and passes through the lens. The
retina sends the signal to the brain along the optic nerve. The image on the
retina is actually upside down, but the brain corrects it. As we get older, our
eyesight becomes worse. This happens because the lens isn’t as flexible as
when we are young and the eye muscles are weaker.
3)Our eyes
are the most important of our five senses. We receive 80% of our information
about the world from our eyes. We also send signals to other people with our
eyes. Some eye signals are unconscious. When we look at something nice our
pupils dilate (get bigger). We cry when we are unhappy and sometimes when we are
very happy. But we can also control some eye signals. For example, we can wink
at someone or raise an eyebrow. Sunglasses make someone appear mysterious or
dangerous, because they hide the eyes and we can’t see the signals.
4)We find
large eyes more attractive. Children have large eyes in proportion to their
heads. Cartoon characters always have large eyes too. We can’t actually change
our eyes, but we can make them look bigger with make- up. False eyelashes can
make the eyes look longer. Eye shadow on the lids can make the eyes look bigger
and more dramatic. Glasses can also make eyes look bigger.
5)We do not
normally look into someone’s eyes for long, especially when they are very
close. Eye contact can be very threatening, so people only do it when they wan
to threaten someone.. It’s also why people don’t look at each other in
lifts.
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