Question

Here are some questions form Science.

How are we able to see distant and nearby objects clearly?
Which part of eye helps in changing curvature of lens?
Why no image is formed at blind spot?

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Answer 1

Answers :

1) We are able to see distant and nearer objects clearly because of the Eyes ability to change focal length of the lens. This phenomenon is called accommodation.

2) The part of eye that helps in changing the curvature of lens is Ciliary muscles.

When the Ciliary muscles are strained, The eye has minimum focal length. And When they relax, The eye has maximum focal length.

3) No image is formed at Blind Spot because absence of rods and cones.

Answer 2

When the object distance changes accordingly the focal length of the eye lens changes such that the image is formed at retina.

The eye lens is attatched to the cilliary muscle that change the focal length of the convex lens i.e.eye lens by contracting to decrease focal length and relaxing to increase focal length.

The image is formed at the blind spot.

It is formed but not recepted or you can say detected by the brain because no rod or cone cells are present at the blind spot because through this point optic nerves enter the eye.

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