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प्रश्न
Mention, if the following statement is True or False
Cones are the receptor cells in the retina of the eye sensitive to dim light.
विकल्प
True
False
उत्तर
False
Correct Statement: Cones are the receptor cells in the retina of the eye sensitive to bright light
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संबंधित प्रश्न
Name the part of the retina which is insensitive to light.
Define the term "power of accommodation" of human eye.
What happens to the eye when you enter a darkened cinema hall from bright sunshine? Give reason for your answer.
What shape are your eye-lenses:
when you look at your hand?
What is presbyopia? Write two causes of this defect. Name the type of lens which can be used to correct presbyopia.
The animals of prey have:
(a) two eyes at the front
(b) two eyes at the back
(c) two eyes on the sides
(d) one eye at the front and one on the side
Label the following diagram :
Give the main function of the following:
Lachrymal glands
What is a stereoscopic vision?
Differentiate between:
Retina and Choroid.
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.
Name the following:
The area where the image is formed but not seen by our eye is termed as.
Give Technical Term:
The cells of the retina that are sensitive to colour.
Choose the Odd One Out:
Complete the following sentence with appropriate Word
The photoreceptor cells of the retina sensitive to colour are:
A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his text book. Which of the following statements is correct?
A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in Figure . In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?
 |
 |
 |
 |
| (i) | (ii) | (iii) | (iv) |
Which part of the eye gets affected if someone is suffering from cataract? How is it treated?
Given below is a cross section of the human eye. Match the structures marked (a) to (e) with their correct functions:
Example: (f) - 6. Holds the lens in position
| Cross section of Human Eye | Functions | |
 |
1. | Protects retina |
| 2. | Regulates the size of the pupil | |
| 3. | Alters the shape of the lens | |
| 4. | Keeps the lens moist | |
| 5. | Transmits nerve impulses to brain | |
| 6. | Holds the lens in position |
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 |
