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प्रश्न
Define the term "power of accommodation" of human eye.
उत्तर
The power of accommodation of the human eye refers to the ability of the eye to change the focal length of its lens so as to focus the light from both nearby and distant objects on the retina.
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संबंधित प्रश्न
Write the function of the following part of the human eye:- iris
The size of the pupil becomes ______ when you see in dim light.
Explain the mechanism of vision.
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 job does the pupil of the eye do?
Name the part of the retina which is insensitive to light.
Out of rods and cones m the retina of your eye:
which detect colour?
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?
A person walking in a dark corridor enters into a brightly lit room:
State the effect on the pupil of the eye.
List, in order, the parts of the eye through which light passes to reach the retina.
To focus the image of a nearby object on the retina of an eye:
(a) the distance between eye-lens and retina is increased
(b) the distance between eye-lens and retina is decreased
(c) the thickness of eye-lens is decreased
(d) the thickness of eye-lens is increased
Which parts of the eye cause rays of light to converge on the retina?
State the function of each of the following parts of the human eye:
(i) Cornea
(ii) Iris
(iii) Pupil
(iv) Retina
Millions of people of the developing countries are suffering from corneal blindness. This disease can be cured by replacing the defective cornea with the cornea of a donated eye. Your school has organised a campaign in the school and its neighbourhood in order to create awareness about this fact and motivate people to donate their eyes after death. How can you along with your classmates contribute in this noble cause? State the objectives of organising such campaigns in schools.
State the main functions of the following:
Coronary Artery
Name the following:
White part of the eye.
Define the following:
Yellow spot
Label the following diagram :
Choose the correct answer.
Aperture controlling passage to light into the eye is ___________
Differentiate between:
Vitreous humour and Aqueous humour.
Give Technical Term:
The nutritive layer of the eye which also presents reflection of light.
Choose the Odd One Out:
Vision defect that increases distance between the lens of the eye and retina of the eye is termed as myopia.
Write an Explanation.
Minimum distance of distinct vision
Write the function of the human eye and label parts of the figure given below.
______ is the structural and functional unit of living organisms.
A prism ABC (with BC as base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in Figure . In which of the following cases, after dispersion, the third colour from the top corresponds to the colour of the sky?
 |
 |
 |
 |
| (i) | (ii) | (iii) | (iv) |
From where the following nerves arise.
Optic nerve
______ is a transparent layer.
The coloured portion of the eye is the ______.
Describe the parts in the external structure of the eye.
