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The transparent lens in the human eye is held in its place by?

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Important Questions on Ray Optics

HARD
Choose the correct statements.
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The transparent lens in the human eye is held in its place by
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The change in focal length of an eye-lens is caused by the action of the_____.
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Which one of the following parts of the eye is affected in cataract?
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In the mammalian eye, the 'fovea' is the the center of the visual field, where:
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The photosensitive compound in the human eye is made up of:
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A person can see clearly object only when they lie between 50 cm to 400 cm from his eyes. In order to increase the maximum distance of distinct vision to infinity, the type and power of the correcting lens, the person has to use, will be
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What power should the reading spectacles (lens) have for a person for whom the least distance is 50 cm (in dioptre)
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In a blind spot of the human eye
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When one goes from a brightly lit area to a dimly lit room our eyes adjusts slowly, thereby regaining the clarity of vision. Which ONE of the following explains this process?
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Consider the following vision defects listed in Columns I and II and the corrective measures in Column III. Choose the correct combination.

   Column I    Column II    Column III
 P.  Hypermetropia  (i)  Near-sightedness  a.  Convex lens
 Q.  Myopia  (ii)  Far-sightedness  b.  Concave lens
MEDIUM
Which one of the following statements is not correct?
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The human eye has a lens which has a:
HARD
Which of the following statement is correct?
(i) The rods contain a purplish-red protein called the rhodopsin.
(ii) The photopigments are embedded in the membrane discs of the inner segment.
(iii) Retinal is a derivative of vitamin A.
(iv) Light induces dissociation of the retinal from opsin resulting in changes in the structure of the opsin.
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Your friend is having eye sight problem. She is not able to see clearly a distant uniform window mesh and it appears to her as nonuniform and distorted. The doctor diagnosed the problem as :
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A student studying the similarities and differences between a camera and the human eye makes the following observations:
I Both the eye and the camera have convex lenses.
IIIn order to focus, the eye lens expands or contracts while the camera lens moves forward or backward.
III The camera lens produces upside down real images while the eye lens produces only upright real images.
IV A screen in camera is equivalent to the retina in the eyes.
V A camera adjusts the amount of light entering in it by adjusting the aperture of the lens. In the eye the cornea controls the amount of light. The correct statements are :
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The least distance of distinct vision for a normal eye is
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Which statement is CORRECT regarding blind spot in human eye?

It ___________.

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Match the following columns and select the correct option:-

Column-I column-II
(a) Rods and cones (i) Absence of photoreceptor cells
(b) Blind spot (ii) Cones are densely packed
(c) Fovea (iii) Photoreceptor cells
(d) Iris (iv) Visible coloured portion of the eye
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Which of the following statements is correct?