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प्रश्न
Write the main functional activity of the following structure.
Ciliary body and suspensory ligament
उत्तर
Ciliary body and suspensory ligament contains muscles which on contraction and relaxation, change the shape of the lens (being somewhat elastic) for viewing objects at different distances.
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
Draw labelled diagrams of the following: Eye
Distinguish between: aqueous humor and vitreous humor
The optical prescription for a pair of spectacles is :
Right eye : −3.50 D
Left eye : −4.00 D
Which is the weaker eye?
What is the function of the lens in the human eye?
What is the:
far point of a normal human eye?
What changes take place in the shape of eye-lens:
when the eye is focused on a distant object?
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 focal length of eye-lens will be the maximum?
Describe the working of the human eye with the help of the above diagram.
A student sitting on the last bench in the class cannot read the writing on the blackboard clearly but he can read the book lying on his desk clearly. Which of the following statement is correct about the student?
(a) The near point of his eyes has receded away.
(b) The near point of his eyes has come close to him.
(c) The far point of his eyes has receded away.
(d) The far point of his eyes has come closer to him.
Name the following:
The part of the eye responsible for its shape.
The diagram alongside represents a certain defect of vision of the human eye.
(i) Name the defect.
(ii) Describe briefly the condition in the eye responsible for the defect.
(iii) Redraw the figure by adding a suitable lens correcting the defect. Label the parts through which light-rays pass.
(iv) What special advantage do human beings derive in having both eyes facing forward?
Choose the correct answer.
In the chemistry of vision, the photosensitive substance is _________________
Differentiate between:
Vitreous humour and Aqueous humour.
Mention, if the following statement is True or False
Cones are the receptor cells in the retina of the eye sensitive to dim light.
Choose the Odd One Out:
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.
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.
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 accomadation |
