The eyeball is the size of a , tennis ball, pingpong ball, sliotar, The scalera, lets light through, Protects the eye, Controls the amount of light coming into the eye, The Cornea is at the , back of the eye, front of the eye, Middle of the eye, The iris is, The white part of the eye, The coloured part of the eye, The Black hole in the centre of the iris, The pupil is, red, black, blue, The lens, focuses the light onto the retina , allows light in, contains 120 million cells, The Retina contains rods and cones, True, False, REM means, Rapid eye mobile, Rapid eye movement, Rapid eye molecules, Girls are more likely to be colour blind, False, True, The image reflected onto the retina is upside down , True, False.

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