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प्रश्न
What is the function of the lens in the human eye?
उत्तर
In the human eye, the function of the lens is to focus the light rays entering the eye from an object and form a real and inverted image of the object on the light-sensitive screen called the retina.
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संबंधित प्रश्न
The region of the vertebrate eye, where the optic nerve passes out of the retina, is called the
(a) fovea
(b) iris
(c) blind spot
(d) optic chaisma
Which. of the following has normal vision?
(a) Xc Xc
(b) Xc Y
(c) XC Xc
(d) Xc Yc
A person got his eyes tested by an optician. The prescription for the spectacle lenses to be made reads :
Left eye : +2.50 D
Right eye : +2.00 D
State whether these spectacle lenses will converge light rays or diverge light rays.
A person walking in a dark corridor enters into a brightly lit room:
State the effect on the pupil of the eye.
An object is moved closer to an eye. What changes must take place in the eye in order to keep the image in sharp focus?
Sketch and label V.S. of a human eye.
Long answer question
Draw the neat labelled diagram of the Sectional view of the human eye.
Which of the following statements is correct regarding rods and cones in the human eye?
Match the following.
| Column - I | Column - II | ||
| 1 | Retina | a | Path way of light |
| 2 | Pupil | b | Far point comes closer |
| 3 | Ciliary muscles | c | near point moves away |
| 4 | Myopia | d | screen of the eye |
| 5 | Hypermetropia | e | Power of accomadation |
Name the following:
The fibres which collectively hold the lens in position.
