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प्रश्न
State one role of ciliary muscles in the human eye.
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उत्तर
The ciliary muscles in the eye support the lens and hold it in place. They also change the shape of lens by contracting or relaxing. This process is called accommodation.
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संबंधित प्रश्न
Differentiate between myopia and hypermetropia. What type of spectacles should be worn by a person having the defects of myopia as well as hypermetropia? How does it help?
A young man has to hold a book at arm's length to be able to read it clearly. The defect of vision is:
(a) astigmatism
(b) myopia
(c) presbyopia
(d) hypermetropia
A person can read a book clearly only if he holds it at an arm's length from him. Name the defect of vision:
if the person is an old man
Which part of the eye is grafted in a needy patient from a donated eye?
Name the following:
The photosensitive pigment present in the rods of the retina.
Have a look at the posture of this girl who is reading a book and answer the questions which follow:
Name the problem she is facing.
Draw a ray diagram to show how Hypermetropia is defect can be corrected using a lens.
What type of lens is used to correct Hypermetropia?
Choose the Odd One Out:
Assertion: Myopia is the defect of vision in which a person cannot see distant objects clearly.
Reason: This due to eye-ball being too short.
