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      Question

      Which one of the following is used to remove

      Astigmatism for a human eye?
      A Concave lens Correct Answer Incorrect Answer
      B Convex lens Correct Answer Incorrect Answer
      C Cylindrical lens Correct Answer Incorrect Answer
      D Prismatic lens Correct Answer Incorrect Answer

      Solution

      A cylindrical lens is a lens which focuses light into a line instead of a point, as a spherical lens would.

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