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प्रश्न
Answer the following question.
Write the structure of eye lens and state the role of ciliary muscles in the human eye.
उत्तर
The eye lens being convex in nature converges the light rays incident on it. Hence, it focuses the light falling on it on a thin layer of nerve cells called the retina. Two Ciliary muscles hold the lens within the eye-ball and it relaxes and tightens to change the focal length of the eye lens to get a clear image on the retina.
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संबंधित प्रश्न
What change is made in the eye to enable it to focus on objects situated at different distances? Illustrate your answer with the help of diagrams.
Draw a simple diagram of the human eye and label clearly the cornea, iris, pupil, ciliary muscles, eye-lens, retina, optic nerve and blind spot.
Give the main function of the following:
Three semicircular canals
Give the main function of the following:
Retina
Choose the correct answer.
Aperture controlling passage to light into the eye is ___________
The image of the object in the human eye is formed on the cross screen.
The pigmented circular area seen in front of the eye:
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?
From where the following nerves arise.
Optic nerve
State the functions of the following:
Iris
