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प्रश्न
Choose the correct answer.
In the chemistry of vision, the photosensitive substance is _________________
विकल्प
melanin
sclerotin
rhodopsin
none
उत्तर
In the chemistry of vision, the photosensitive substance is rhodopsin
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संबंधित प्रश्न
Describe the anatomy of the human eye.
Explain the mechanism of vision.
Draw a neat and labelled diagram of the structure of the human eye.
Name the part of the eye:
which changes the focal length of eye-lens.
Where does the greatest degree of refraction of light occur in the eye?
Fill in the following blank with suitable word:
To bring light from a near object to a focus on the retina of the eye, the convex eye-lens need to be made....................
Describe and explain, how a normal eye can see objects lying at various distances clearly.
Describe the working of the human eye with the help of the above diagram.
The term " accommodation" as applied to the eye, refers to its ability to:
(a) control the light intensity falling on the retina
(b) erect the inverted image formed on the retina
(c) vary the focal length of the lens
(d) vary the distance between the lens and retina
The human eye possesses the power of accommodation. This is the power to:
(a) alter the diameter of the pupil as the intensity of light changes
(b) distinguish between lights of different colours
(c) focus on objects at different distances
(d) decide which of the two objects is closer.
Mention if the following statement is true (T) or false (F) Give reason.
yellow spot of the retina is the region of colour vision
Mention if the following statement is true (T) or false (F) Give reason.
Blind spot is called so because no image is formed on it.
Choose the correct answer.
Aperture controlling passage to light into the eye is ___________
What is a stereoscopic vision?
Choose the Odd One Out:
Which part of the eye gets affected if someone is suffering from cataract? How is it treated?
With reference to human eye, answer the following question.
What is blind spot?
An aperture that controls the passage of light into the eye is ______.
The figure given below refers to the vertical section of the eye of a mammal. Study the figure carefully and answer the following questions.
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- Label the guidelines shown as 1 to 10.
- Write one important role of parts shown as 3 and 7.
- Write one structural difference between the parts shown as 9 and 10.
- Mention one functional difference between the parts shown as 6 and 8.
