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प्रश्न
With reference to the functioning of the eye, answer the question that follow:
What is the shape of the lens during near vision?
उत्तर
When you are looking at a near object, the lens needs to become more rounded at the central surface in order to focus the light rays
संबंधित प्रश्न
Out of rods and cones m the retina of your eye:
which work in dim light?
What changes take place in the shape of eye-lens:
when the eye is focused on a near object?
Which of the following changes occur when you walk out of bright sunshine into a poorly lit room?
(a) the pupil becomes larger
(b) the lens becomes thicker
(c) the ciliary muscle relaxes
(d) the pupil becomes smaller
Why does the eye-lens not have to do all the work of converging incoming light rays?
Explain why, when it is getting dark at night, it is impossible to make out the colour of cars on the road.
With reference to the functioning of the eye, answer the question that follow:
Name the cells of the retina and its respective pigments which get activated in the dark.
State the main functions of the following:
Coronary Artery
Give the main function of the following:
Fovea centralis
Choose the correct answer.
Colour is detected by ____________
What is meant by power of accommodation of the eye?
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 scientific reason.
The movie cannot be enjoyed if seat of a viewer is too close to the screen in the cinema.
______ is tough and thick white sheath that protects the inner parts of the eye.
Which of the following statements is correct regarding rods and cones in the human eye?
Describe the parts in the external structure of the eye.
The change in the focal length of an eye lens in human beings is caused by the action of ______.
Name the following:
Place of no vision in the retina of the eye.
Match the terms in column I with those in column II and write down the matching pairs.
| Column I | Column II | ||
| (i) | Conjunctiva | (a) | Viral infection |
| (ii) | Cornea | (b) | Ciliary body |
| (iii) | Choroid | (c) | Spiral-shaped |
| (iv) | Cochlea | (d) | Transparent epithelium |
| (v) | Conjunctivitis | (e) | Suspensory ligament |
| (f) | Contains melanin | ||
| (g) | Transparent but appears black |
Write the main functional activity of the following structure.
Ciliary body and suspensory ligament
