give the meaning of the terms (a) power of accommodation of the human eye (b) least distance of distinct vision (c) range of vision
Answers
The least distance of distinct vision is the minimum distance of an object to see clear and distinct image. It is 25 cm for a young adult with normal visions. Answer: (c) The relaxation or contraction of ciliary muscles changes the curvature of the eye lens.
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(A) A special ability of the eye ; the ciliary muscles of the eye change the focal length of an eye lens to focus distant , as well as nearly objects , clearly on the retina . This special ability is called power of accommodation.
(B) The minimum distance at which objects can be seen most distinctly is called least distance of distinct vision.
(C)The distance between the near point and far point of a normal eye is called its range of vision .
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