The Human Eye
Class 10 Science: the human eye (defects of vision)
See why some eyes need glasses. Pick an eye and the right lens to focus the image on the retina.
Words to know
- Retina
- The light-sensitive layer at the back of the eye where the image forms.
- Myopia
- Short-sightedness: far objects look blurry; corrected with a concave lens.
- Hypermetropia
- Long-sightedness: near objects look blurry; corrected with a convex lens.
- Eye lens
- Focuses light onto the retina by changing its shape.
Quick check
Answer 3 questions to check what you learned.
Try at home
Hold a finger close to your eye and look at it, then look at something far away. Notice the finger blur: your eye lens changes shape to focus near or far.