Science
The Human Body
Conceptual
7–9 yrs
How the Eye Works
眼睛的工作原理
Description
Describe how the eye works: light enters through the pupil, the lens focuses it onto the retina at the back of the eye, and the retina sends signals along the optic nerve to the brain, which interprets the image
Mastery Evidence
- Name the main parts: pupil (lets light in), lens (focuses light), retina (detects light), optic nerve (sends signals to brain)
- Describe the sequence: light enters → lens focuses → retina detects → nerve signals brain → brain interprets image
- Explain that the pupil gets bigger in dim light and smaller in bright light to control how much light enters
Assessment Prompt
Can your child explain what happens inside their eye when they look at something — how light comes in through the pupil and the brain turns it into a picture?
