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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
The optical prescription for a pair of spectacles is :
Right eye : −3.50 D
Left eye : −4.00 D
Are these lenses thinner at the middle or at the edges?
Name the part of our eyes which helps us to focus near and distant objects in quick succession.
Give the scientific names of the following parts of the eye:
a hole in the middle of the iris.
Give the scientific names of the following parts of the eye:
changes shape to focus a picture on the retina.
How does this affect the amount of light entering the eye?
The term " accommodation" as applied to the eye, refers to its ability to:
(a) control the light intensity falling on the retina
(b) erect the inverted image formed on the retina
(c) vary the focal length of the lens
(d) vary the distance between the lens and retina
Nocturnal animals (animals which sleep during the day and come out at night) tend to have wide pupils and lot of rods in their retinas. Suggest reasons for this.
What is presbyopia? Write two causes of this defect. Name the type of lens which can be used to correct presbyopia.
Fill in the following blank with suitable word:
Having two eyes gives a ................field of view.
Mention if the following statement is true (T) or false (F) Give reason.
yellow spot of the retina is the region of colour vision
Name the following:
Short sightedness.
The figure below compares a part of our eye with a part of a photographic camera.
Explain the mode of working and the functions of the parts of the eye mentioned above.
Name the following:
Yellow spot and ciliary muscles are found in.
State the Function:
Cornea
Choose the Odd One Out:
Complete the following sentence with appropriate Word
The aperture in the eye through which light enters is the:
The image of an object at an infinite distance is obtained in a real and erect form through a convex magnifying glass.
At noon the sun appears white as
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 |
With reference to human eye answer the question that follow:
Name the part of the eye associated with the layer providing nourishment to the eye.
