What shape are your eye-lenses:
- When you look at your hand?
- When you look at a distant tree?
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- When we look at our hand, the eye lens is thick. When we look at a nearby object, the eye lens becomes thick or more convex to converge the rays of light from the nearby object (our hand) to form an image on the retina.
- When we look at a distant tree, the eye lens is thin. When we look at a far-off object, the eye is in a relaxed state. The eye lens becomes thin or less convex because a small converging power of the eye lens is sufficient to focus the parallel light rays from the distant object (the tree) to form an image on the retina.
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