Page 44 - Lifelines Pre-intermediate.Student's book

5 Comparisons

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1 What do you know about eyes?
a Discuss these questions.
f Why are brown eyes more common in hotter
parts of the world?
2 Why does our eyesight get worse as we get oider?
I Why are our eyes so important to us?
4 How do someone's eyes show whether they like
something?
5 Why do people wear make-up?
6 People normally don't look at each other in iifts.
Why not?
b Now read the text and compare your ideas.
2 Each paragraph has a sentence rnissing.
a Read the missing sentences and write the number of
each sentence in the correct place.
I But when we don't like something, they become
smaller.
2 This is why lovers gaze into each other's eyes.
3 Many people believe that blue eyes are more
delicate than brown eyes.
4 Pictures in the Pyramids show that the ancient
Egyptians - both men and women - used it.
5 The lens focuses the light onto the retina at the
back of the eye.
b How did you decide the correct positions?
3 Label the diagrarn with these words. What is
each part of the eye for?

. 'eyelid, , elelas-h:,,,pupil:'1, ir:is:,t:;ietjna, o.pJjC, newe
he coloured part of the eye is called the iris. There
are three basic eye colours - brown, blue and
green. A few albino people have red or pink eyes, but
these are very rare. ln fact they are just as tough as
brown eyes, although they are more sensitive to light.

only see part of the eyeball, although the
B & Fu
W BF 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.

ffir, eyes are the most important of our five senses.
%*dWe receive 80% of our information about the
world through 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

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