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प्रश्न
Give the main function of the following:
Retina
उत्तर
Retina - It prevents the reflection of light.
APPEARS IN
संबंधित प्रश्न
Write the function of the following part of the human eye: crystalline lens
Name the part of the retina which is insensitive to light.
Give the scientific names of the following parts of the eye:
a hole in the middle of the iris.
A person walking in a dark corridor enters into a brightly lit room:
State the effect on the pupil of the eye.
What are rods and cones in the retina of an eye? Why is our night vision relatively poor compared to the night vision of an owl?
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
How much is our field of view:
with both eyes open?
With reference to the functioning of the eye, answer the question that follow:
Name the two structure in the eye responsible for bringing about the change in the shape of the lens.
Give scientific reason:
We cannot clearly see an object kept at a distance less than 25 cm from the eye.
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The part of the eye which can be donated from a clinically dead person is the Retina.
Choose the correct answer :
The rods and cones of a vertebrate retina function is to _________
Mention, if the following statement is True or False
Cones are the receptor cells in the retina of the eye sensitive to dim light.
State the Location:
Iris
State the Function:
Aqueous humour
At noon the sun appears white as
A tiny mirror M is fixed on a piece of cardboard placed on a table. The cardboard is illuminated by light from a bulb. The position of eye with respect to position of bulb is shown in the figure as A, B, C and D. In which position mirror will be visible?
 |
 |
 |
 |
| (A) | (B) | (C) | (D) |
Boojho while waving his hand very fast in front of his eyes, observes that his fingers appear blurred. What could be the reason for it?
In human eye the part which allows light to enter into the eye is ______.
The change in the focal length of an eye lens in human beings is caused by the action of ______.
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 |
