Advertisements
Advertisements
Question
Name the following:
The part of the eye responsible for change in the size of the pupil.
Solution
Iris
APPEARS IN
RELATED QUESTIONS
Explain the following:
Mechanism of generation of light-induced impulse in the retina.
Distinguish between: blind spot and yellow spot
The optical prescription for a pair of spectacles is :
Right eye : −3.50 D
Left eye : −4.00 D
Which lens has a greater focal length?
Ciliary muscles of human eye can contract or relax. How does it help in the normal functioning of the eye?
The descriptions of five kinds of images are given below:
(a) diminished and virtual
(b) enlarged and real
(c) enlarged and erect
(d) real and inverted
(e) virtual and the same size
Which one of these describes the image formed:
(i) on the retina of the eye?
(ii) by a magnifying glass?
(iii) by a convex driving mirror on a car?
(iv) by a plane mirror?
(v) on the screen of a slide projector?
What shape are your eye-lenses:
when you look at your hand?
Why does the eye-lens not have to do all the work of converging incoming light rays?
How much is our field of view:
with one eye open?
Define the following:
Yellow spot
Give the main function of the following:
Lachrymal glands
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?
Name the following:
The region in the eye where the rods and cones are located.
State the Function:
Conjunctiva
For a normal human eye the near point is at _______.
The image of the object in the human eye is formed on the cross screen.
Select the option with incorrect identification:
Which cells of the retina enable us to see coloured objects around us?
Match the following:
| Column - I | Column - II | ||
| 1 | Retina | a | pathway 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 |
Name the following:
The layer of the wall of the eye-ball that corresponds to the black lining of the box of a camera
With reference to human eye answer the question that follow:
Name the part of the eye associated with the regulation of the shape of lens.
