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प्रश्न
How does the eye adjust to take account of an increase in brightness?
उत्तर
When there is an increase in brightness, the pupil of the eye contracts so as to allow less light into the eye.
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संबंधित प्रश्न
Distinguish between: aqueous humor and vitreous humor
Name the part of the eye:
which controls the amount of light entering the eye.
What changes the shape of lens in the eye?
Explain why, we cannot see our seats first when we enter a darkened cinema hall from bright light but gradually they become visible.
How does the eye change in order to focus on near or distant objects?
(a) The lens moves in or out
(b) The retina moves in or out
(c) The lens becomes thicker or thinner
(d) The pupil gets larger or smaller
After testing the eyes of a child, the optician has prescribed the following lenses for his spectacles:
Left eye : + 2.00 D
Right eye : + 2.25 D
The child is suffering from the defect of vision called:
(a) short-sightedness
(b) long-sightedness
(c) cataract
(d) presbyopia
The animals called predators have:
(a) both the eyes on the sides
(b) one eye on the side and one at the front
(c) one eye on the front and one at the back
(d) both the eyes at the front
What is meant by power of accommodation of the eye?
Name the following:
The innermost layer of the eye
Assertion (A): Rods and Cones are photoreceptors in the sclera of eyeball.
Reason (R): Rods are sensitive to dim light.
