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प्रश्न
Distinguish between: blind spot and yellow spot
उत्तर
| Blind spot | Yellow spot |
| Blind spot is a spot on the retina present at the point of origin of the optic nerve. | Yellow spot is a small area on the retina present at the posterior pole of the eye, lateral to the blind spot. |
| Photoreceptor cells are absent from this region. | Only cones are present in this region. |
| They are insensitive to light as both rods and cones are absent. | They are sensitive to bright light as cones are present. |
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संबंधित प्रश्न
Write the function of the following part of the human eye: crystalline lens
Write the function of the following part of the human eye: ciliary muscles
How does the eye regulate the amount of light that falls on the retina?
What is the name of:
the light-sensitive layer in 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?
What are rods and cones in the retina of an eye? Why is our night vision relatively poor compared to the night vision of an owl?
Mention the characteristics of the image that falls on the retina of the eye.
The figure below compares a part of our eye with a part of a photographic camera.
Name the corresponding parts of the eye the camera shown here that are comparable in function.
What is the function of iris and the muscles connected to the lens in human eye?
Give the main function of the following:
Fovea centralis
Choose the correct answer.
Which one is the photoreceptor _____________
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.
The image of an object at an infinite distance is obtained in a real and erect form through a convex magnifying glass.
Explain the structure and functioning of Human eye. How are we able to see nearby as well as distant objects?
Which part of the eye gets affected if someone is suffering from cataract? How is it treated?
Which one of the following statements is NOT correct?
Name the following:
The fibres which collectively hold the lens in position.
The thin, transparent extension of sclerotic layer found in front of the lens is ______.
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 |
