GK
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Long sightedness
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Short sightedness
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Colour blindness
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Night blindness
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Detailed explanation-1: -Myopia or short sightedness is the defect in which person is unable to focus far off objects clearly. This happens as the eye is unable to relax its eye lens enough to form the image on retina and the final image is formed in front of retina.
Detailed explanation-2: -Myopia or Nearsightedness occurs when the eye loses its ability to focus on far-off objects as the lenses do not possess a long focal length. Objects that are near are clearly visible to patients of this defect.
Detailed explanation-3: -Myopia is a vision defect, where a person cannot see distant objects distinctly after a limit but can see nearby objects. Generally, Myopia is caused due to two reasons. (I) The variation happens in the distance between the eye lens and the retina as it becomes larger when the eyeball gets elongated along its axis.