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प्रश्न
Choose the correct answer.
Which one is the photoreceptor _____________
पर्याय
organ of corti
organ of sylvious
cristae
macula
उत्तर
Which one is the photoreceptor macula
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संबंधित प्रश्न
Define the term.
Power of accommodation of the eye.
What kind of lens is present in the human eye?
Name the part of the eye:
which changes the focal length of eye-lens.
What is the name of:
the curved, transparent front surface of the eye?
The eyes of a person are focused (i) on a nearby object, and (ii) on a distant object, turn by turn. In which case:
the converging power of eye-lens will be the maximum?
Ciliary muscles of human eye can contract or relax. How does it help in the normal functioning of the eye?
Which of the following controls the amount of light entering the eye?
(a) ciliary muscles
(b) lens
(c) iris
(d) cornea
Which parts of the eye cause rays of light to converge on the retina?
What is presbyopia? Write two causes of this defect. Name the type of lens which can be used to correct presbyopia.
fill in the following blank with suitable word:
A person is short-sighted if his eyeball is too............Spectacles with a .............lens are needed. A person is long-sighted if his eyeball is too............Spectacles with a ................lens are needed. These focus light rays exactly on to the..........
How much is our field of view:
with both eyes open?
Among animals, the predators (like lions) have their eyes facing forward at the front of their heads, whereas the animals of prey (like rabbit) usually have eyes at the sides of their head. Why is this so?
Name the following:
The part of the eye responsible for its shape.
Mention, where in living organism is the following located and state their main function:
Fovea centralis
Name the following:
Fluid present in the posterior chamber of the eye.
State the Function:
Ear drum
Write scientific reason.
The movie cannot be enjoyed if seat of a viewer is too close to the screen in the cinema.
A person cannot see distinctly objects kept beyond 2 m. This defect can be corrected by using a lens of power
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 accommodation |
State the functions of the following:
Ciliary muscles
