Advertisements
Advertisements
प्रश्न
Mention, where in living organism is the following located and state their main function:
Fovea centralis
उत्तर
Fovea centralis is located at the back of the eye almost at the centre of the eyeball. It is the region of the brightest vision and also of the colour vision.
APPEARS IN
संबंधित प्रश्न
Describe the anatomy of the human eye.
What is the:
near point of a normal human eye?
Define the term "power of accommodation" of human eye.
Ciliary muscles of human eye can contract or relax. How does it help in the normal functioning of the eye?
How does the eye change in order to focus on near or distant objects?
(a) The lens moves in or out
(b) The retina moves in or out
(c) The lens becomes thicker or thinner
(d) The pupil gets larger or smaller
Having two eyes gives a person:
(a) deeper field of view
(b) coloured field of view
(c) rear field of view
(d) wider field of view
The region in the eyes where the rods and cones are located is the
Given below is certain structure. Write against them its functional acivity.
retina and ……………………….
Choose the correct answer :
The rods and cones of a vertebrate retina function is to _________
Sketch and label V.S. of a human eye.
What is a Lachrymal gland?
What is a stereoscopic vision?
Draw a diagram of the human eye as seen in a vertical section and label the parts which suit the following descriptions relating to the:
(i) photosensitive layer of the eye.
(ii) structure which is responsible for holding the eye lens in its position.
(iii) structure which maintains the shape of the eyeball and the area of no vision.
(iv) anterior chamber seen in front of the eye lens.
(v) outermost transparent layer seen in front of the eyeball.
For the normal human eye, the near point is at ___________ cm.
The image of an object at an infinite distance is obtained in a real and erect form through a convex magnifying glass.
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) |
The innermost layer of human eye is ______.
State the functions of the following:
Ciliary muscles
Name the following:
Place of no vision in the retina of the eye.
The layer in the eye where sensory cells (rods and cones) are located ______.
