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प्रश्न
Choose the Odd One Out:
पर्याय
Sneezing
coughing
blinking
typing
उत्तर
typing
APPEARS IN
संबंधित प्रश्न
The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to ______.
Out of rods and cones m the retina of your eye:
which detect colour?
Give the scientific names of the following parts of the eye:
a hole in the middle of the iris.
Fill in the following blank with suitable words:
When light is dim, the pupil becomes................
Why does it take some time to see objects in a dim room when you enter the room from bright sunshine outside?
Explain why, when it is getting dark at night, it is impossible to make out the colour of cars on the road.
With both eyes open, a person's field of view is about:
(a) 90°
(b) 150°
(c) 180°
(d) 360°
With reference to the functioning of the eye, answer the question that follow:
What is the shape of the lens during near vision?
We see advertisements for eye donation on television or in newspapers. Write the importance of such advertisements.
Give scientific reason:
We cannot clearly see an object kept at a distance less than 25 cm from the eye.
Define the following:
Yellow spot
Draw a diagram of the human eye as seen in a vertical section and label the parts which suit the following descriptions relating to the:
(i) photosensitive layer of the eye.
(ii) structure which is responsible for holding the eye lens in its position.
(iii) structure which maintains the shape of the eyeball and the area of no vision.
(iv) anterior chamber seen in front of the eye lens.
(v) outermost transparent layer seen in front of the eyeball.
State the Function:
Vitreous humour
Choose the Odd One Out:
In a relaxed state, the focal length of healthy eyes is _______.
The following figure show the change in the shape of the lens while seeing distant and nearby objects. Complete the figures by correctly labelling the diagram.
Which cells of the retina enable us to see coloured objects around us?
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 |
The thin, transparent extension of sclerotic layer found in front of the lens is ______.
