What is sphere measurement for eye exams?

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1093673

2026-06-01 13:25

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  1. sphere, standard lens shape (convex or concave) to correct focus
  2. cylinder, cylinder shape (both magnitude and angle) to correct astigmatism
  3. prism, wedge shape (very rare) to correct the direction the eye is looking (sometimes used to compensate for double vision)

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