My reading goal


Monitor my understanding. How the Human Eye Sees


Capturing an Image For centuries people have searched for ways to record the images of things which they saw around them. Stone Age artists made wall paintings, sculptors built statues, artists painted pictures and frescoes. Today it is nothing unusual for us to capture images and to keep them to look at (things like photographs, films, television and video cassettes). But none of this would be possible if scientists and inventors had not discovered and understood how the human eye works and tried to reproduce the function of the eye by mechanical means. From simple boxes in which short-lived images are formed, right up to modern methods of technology which can preserve images how, when and where required, the function of the human eye is always at the beginning of the story.


How the Eye Works Materials ● Clear glass bowl (like a goldfish bowl) ● A table lamp ● A piece of card which is black on both sides ● A piece of white card ● Scissors ● Water ● A darkened room Method 1. Fill the bowl with water.


2. With the scissors, make a small hole at the centre of the black card. Place this against the glass bowl.


3. Place the white card opposite so that it faces the bowl.


4. Darken the room and switch on the table lamp. Line this up in front of the black card, so that the beam of light is the same height as the hole.


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