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प्रश्न
Write the function of retina in human eye.
उत्तर १
The retina is the “film” of the eye like the film of a camera. The retina is the light-sensing part of the eye. It converts the incident light into electrical signals and sends them to the brain.
उत्तर २
The retina acts as a screen on which the image is formed in the eye. The retina has a large number of light-sensitive cells. When the image falls on the retina then these light-sensitive cells get activated and generate electrical signals.
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संबंधित प्रश्न
Explain the functions of the following parts of the eye:
(i) cornea
(ii) iris
(iii) pupil
(iv) ciliary muscles
(v) eye-lens
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
After testing the eyes of a child, the optician has prescribed the following lenses for his spectacles:
Left eye : + 2.00 D
Right eye : + 2.25 D
The child is suffering from the defect of vision called:
(a) short-sightedness
(b) long-sightedness
(c) cataract
(d) presbyopia
With both eyes open, a person's field of view is about:
(a) 90°
(b) 150°
(c) 180°
(d) 360°
Name the muscles of the eye responsible for the power of accommodation.
What is the function of iris and the muscles connected to the lens in human eye?
The figure below compares a part of our eye with a part of a photographic camera.
Explain the mode of working and the functions of the parts of the eye mentioned above.
Sketch and label V.S. of a human eye.
State the Function:
Ear drum
______ is a transparent layer.
