THE SIGHT

INDEX

• Characteristics • Parts of the sight• What is each part• How the eye works• Photos • End

CHARACTERISTICS

• Your sense of sight lets you see things with your eyes. Your eyes can detect information about the shape, colour and location of things around you.

PARTS OF THE SIGHT

WHAT IS EACH PART

• IRIS: is the coloured part of the eye, around the pupil. It’s made of muscle fibres that open and close the pupil.

• PUPIL: is a small hole that lets light into the eye.

• LENS: is behind the pupil and the iris. If focouses light on the retina.

• RETINA: has got a thin layer of optic cells that detect light and colours. These optic cells send information to the optic nerve.

• CORNEA: is a transparent layer of cells. It covers and protects the iris and the pupil.

HOW THE EYE WORKS• 1: Light goes into the eye through the pupil.

Then it passes through the lens.• 2: The lens projects an upside down image

onto the retina. The optic cells in the retina detect the light and colour. Then they send nerve impulses to the optic nerve.

• 3: The optic nerve transmit the nerve impulses to the brain. Finally, the brain interprets the impulses. It also turns the image the right way up again.

PHOTOS

NURIA