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प्रश्न
Differentiate between members of the following pair with reference to what is asked in the bracket.
Near and distant accomodation (shape of lens).
उत्तर
| Near accomodation | Distant accomodation |
| Near vision lenses tend to be more convex or rounded. | For distant objects, the lens is flattened and narrower. |
संबंधित प्रश्न
What happens to the image distance in the eye when we increase the distance of an object from the eye?
The change in focal length of an eye lens is caused by the action of the ______.
Write the name.
The sensation on the retina persists for a while is
Write the name.
The persons which are unable to distinguish between different colours
Write an Explanation.
Persistence of vision
Identify and explain concepts given in this diagram.
Near and far points of a young person normal eye respectively are:
The ability of the eye lens to adjust its focal length to form a sharp image of the object at varying distances on the retina is called:
The focal length of the eye lens increases when eye muscles ____________.
When light rays enter the eye, most of the refraction occurs at the
How are we able to see nearby and also the distant objects clearly?
A piece of red glass is heated till its glows in dark. The colour of flowing glass would be:-
In the blind spot of the human eye ______.
Adjusting the focal length of the eye lens to view objects at different distances is done by ______.
Name the following:
Two types of adaptations.
Define the following term:
Adaptation
Differentiate between members of the following pair with reference to what is asked in the bracket.
Dark and light adaptation (pigments which will be regenerated).
The figures (A) and (B) given below are showing some kind of adjustment. Study the figures and answer the questions that follow.
| A |  |
 |
B |
- Identify the kinds of adjustments done in the figures (A) and (B).
- Distinguish between the adjustments of figures (A) and (B) on the basis of:
- The size of pupil.
- The pigment which gets regenerated.
- Cells of the retina.
