To know that cells called receptors detect stimuli

To describe how signals get from receptor cells to the brain

To link these ideas to how the eye and the brain work together to enable you to see.

Design a chart opticians use and test each others eye sight, try it with someone’s glasses on or without (have fun and experiment

Open up a Powerpoint document and save it as ‘receptors’.

• Imagine you are on a safari in Africa and then get transported to the alps. How does their body change, how are these changes detected.

• Discuss with your class and your teacher how receptors detecting stimuli in eye and skin send messages to brain in form of nerve impulses. Would the message still get through if you lost a particular nerve?
• Ask your teacher if they can demonstrate an eye dissection, try to locate and label parts. If you are squeamish let the teacher know. After the dissection go back to your work and explain how each part works helping us to see image, you could also complete a worksheet by clicking here eye dissection worksheet  
• Draw an eye either from the dissection or text book and annotate. Use these 2 websites for help

1) inside and outside the eye

2) The eye_bitesize

• Find out about rods and cones using this website This is good

• Ask your teacher for the materials to make your own 3D glasses
• What’s the difference between long and short sighted vision, what problems does the eye have and how can it be corrected.

If you are feeling really brainy find out the 3 types of cone cells which give us our sense of colour vision using this website This is good