2. To identify the key parts of the eye and how they work
Homework: To be able to label the parts of the eye and state what each does

3. What is perception - video
Listening & discussion – see how the eye is set up – biology
Listening and discussion – the role of the retina
Make & create – Label your own eye diagram
Written task – what the function of each part of the eye is
Homework – create your own eye poster for your revision folders

4. TO IDENTFY THE KEY PARTS OF THE EYE AND HOW THEY WORK
PERCEPTION VISION
Threshold of sensation
Psychological state
Stimuli

5. The eye with good alignment is your dominant eye!
Use both eyes…at arm’s length, center target within finger OK sign
Lock hand in position…see which eye is still aligned by closing the other
The eye with good alignment is your dominant eye!

6. Copyright Norton Presentation Manager
HUMAN Vs INSECT VISION
Copyright Norton Presentation Manager

7. It makes you wonder what exactly they see!
SPIDERS HAVE UP TO 8 EYES LOOKING IN DIFFERENT DIRECTIONS!!
It makes you wonder what exactly they see!

8. Copyright Norton Presentation Manager
VERTEBRATE EYE
senses image
Copyright Norton Presentation Manager
focuses image
Blind Spot
What?
controls light
sends image to brain

9. BLIND SPOT
CD jpg 9

10. Figure 46-8 10 The structure of the vertebrate eye.
In the retina, cells are arranged in layers.
Pigmented epithelium
Ganglion cells
Connecting neurons
Photoreceptor cells
Sclera
Retina
Iris
Direction of light
Pupil
Cornea
Fovea
Lens
Optic nerve (to brain)
Axons to optic nerve 10

11. Retina (photoreceptors are on the inside surface)
Figure 46-9
Retina (photoreceptors are on the inside surface)
Cornea
Lens
Sensory nerves to brain 11

12. Vertebrate Retina
rod
cone
light

13. Rods and cones contain stacks of membranes.
Figure 46-10
Rods and cones contain stacks of membranes.
0.5 µm
Cone
Rod
Opin 13

14. Use both eyes, stare at area shown in blue for 15 seconds or so

15. What do you see on this blank white slide?
Blink if need be!
This is called an “after image”
Does it move around as you move your gaze?

16. Use both eyes, stare at the parrot’s eye for 15 seconds or so

17. What color is the bird in the cage?
Blink if needed

18. Use both eyes, stare at the parrot’s eye for 15 seconds or so

19. What color is the bird in the cage?
Blink if needed

20. Use both eyes, stare at the parrot’s eye for 20 seconds or so

21. What color is the bird in the cage?
This color is a bit harder to visualize

22. Use both eyes, stare at the white dot for 20 seconds or so

24. What colour is this dress?

25. To identify the key parts of the eye and how they work…
7RD4E1p3vc&list=UU0sncyf0KJ1lB-sLECNou9A ow_we_see?language=en (16.5 minutes)