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प्रश्न
Define the term.
Power of accommodation of the eye.
Answer the following question.
What is meant by the power of accommodation of the eye?
उत्तर १
The ability of the eye lens to adjust its focal length, so as to clearly focus rays coming from distant as well a near objects on the retina, is called the power of accommodation of the eye.
उत्तर २
When the ciliary muscles are relaxed, the eye lens becomes thin, the focal length increases, and the distant objects are clearly visible to the eyes. To see the nearby objects clearly, the ciliary muscles contract making the eye lens thicker. Thus, the focal length of the eye lens decreases and the nearby objects become visible to the eyes. Hence, the human eye lens is able to adjust its focal length to view both distant and nearby objects on the retina. This ability is called the power of accommodation of the eyes.
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संबंधित प्रश्न
Which. of the following has normal vision?
(a) Xc Xc
(b) Xc Y
(c) XC Xc
(d) Xc Yc
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?
Where is the image formed in a human eye?
What do the ciliary muscles do when you are focusing on a nearby object?
Give the scientific names of the following parts of the eye:
a hole in the middle of the iris.
Fill in the following blank with suitable word:
The iris controls the amount of................entering the eye.
How much is our field of view:
with one eye open?
Name the following:
The pigmented circular area seen in the eye.
Name the following:
The area where the image is formed but not seen by our eye is termed as.
Give Technical Term:
The adjustment of the eye in order to obtain a clear vision of objects at different distances
State the Location:
Iris
Complete the following sentence with appropriate Word
The aperture in the eye through which light enters is the:
Write the name.
The fleshy screen behind cornea.
A student sitting on the last bench can read the letters written on the blackboard but is not able to read the letters written in his text book. Which of the following statements is correct?
We cannot distinguish colours in dim light. Explain giving suitable reasons.
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) |
Chris was watching the display of fireworks in the sky.
- Trace the path of the light rays using the following terms:
Fovea, Lens, Conjunctiva, Pupil, Cornea. - Name the nerve that carries the impulse for vision to the brain.
Write the main functional activity of the following structure.
Ciliary body and suspensory ligament
With reference to human eye answer the question that follow:
Name the part of the eye associated with keeping the lens moist and protecting it from physical shock.
