1. South Tuen Mun Government 1999 - 00 Integrated Science Project
Secondary School
Integrated Science Project
1. The Structure of Eye.
2. Corrections of long sight and short
sight.

2. The structure of eye Eye muscle lens retina pupil cornea iris
Blind spot

3. Find out the uses of the different parts of the eye from your textbook!

4. Do you want to learn more?

5. Eye muscle conjunctiva cornea Retina lens iris Optic nerve Blind spot
Rotates the eyeball
Protects the cornea
cornea
Allows light to pass through
Retina
Contains rods for black and white vision, and cones for colour vision
Refracts light into eye
lens
Refracts and focuses light onto the retina
iris
Optic nerve
Blind spot
Regulates the size of the pupil and hence the amount of light entering the eye
Transmits nerve impulses to the optic centre in the cerebral cortex
No cones or rods

6. Long sight & Short sight

7. image formed behind the retina
Long sight
image formed behind the retina

8. Reasons for long-sight
1. The eye lenses are too thin.
2. The eyeballs are too short.

9. Long sight is corrected by convex lens
image formed on the retina
convex lens

10. Short sight
image formed in front of the retina

11. Reasons for short-sight
1. The eye-lenses are too thick.
2. The eyeballs are too long.

12. Short sight is corrected by concave lens
image formed on the retina
concave lens

13. Group members Leader : Chu Chi Ming Secretary : Lam Shu Chi Artist : Chan Chi Yeung Computer Technician(1) : Siu Sik Lam Computer Technician(2) : Po Man Yung

14. Reference New Integrated Science 2
Mastering Basic Concept in Biology 2

15. The End