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प्रश्न
Differentiate between: Rods and cones
उत्तर
| Rods | Cones | |
| 1 | Rods help in twilight vision. | Cones help in colour vision. |
| 2 | They have visual purple pigment called rhodopsin. | They have visual violet pigment called iodopsin |
| 3 | Rods are the photoreceptor cells of the retina that are sensitive to dim light. | Cones are the photoreceptor cells of the retina that are sensitive to bright light. |
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संबंधित प्रश्न
Write the function of the following part of the human eye: crystalline lens
Night birds have ______ cones than rods in their eyes.
How does the eye adjust to take account of an increase in brightness?
What is the:
far point of a normal human eye?
The human eye forms the image of an object at its ______.
Which of the following changes occur when you walk out of bright sunshine into a poorly lit room?
(a) the pupil becomes larger
(b) the lens becomes thicker
(c) the ciliary muscle relaxes
(d) the pupil becomes smaller
Explain clearly why, a person who has lost the sight of one eye is at a disadvantage compared with the normal person who has two good eyes.
Name two animals having eyes:
at the front of the head.
The animal which does not have eyes that look sideways is:
(a) Horse
(b) Chicken
(c) Lion
(d) Fish
Choose the correct answer.
Colour is detected by ____________
Differentiate between:
Retina and Choroid.
Name the following:
Yellow spot and ciliary muscles are found in.
Give Technical Term:
Name the part of the retina on which an object is focused for the clearest vision.
Mention, if the following statement is True or False
Cones are the receptor cells in the retina of the eye sensitive to dim light.
Write the name.
The screen with light sensitive cells in human eye.
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 |
Arrange and rewrite the term in group in correct order to be in a logical sequence, beginning with the term that is underlined:
Pupil, Aqueous humour, Retina, Vitreous humour.
Name the following:
Capacity of the eye to focus at different distances.
Give reason:
Blind spot is considered as 'area of no vision'.
