Question

What is Cylindrical and spherical eyesightedness?

Answer 1

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 ANSWER

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The term "sphere" means that the correction for nearsightedness or farsightedness is "spherical," or equal in all meridians of the eye. ... The number in the cylinder column may be preceded with a minus sign (for the correction of nearsighted astigmatism) or a plus sign (for farsighted astigmatism).

Answer 2

Explanation:

sphere is the correct answer