How do I convert eyesight into fractions like 6/6 or 6/20? My eyesight is L: -6.00, R: -5.50 (spherical) + 0.5 (cylinderical at +90 degrees.
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How do I convert eyesight into fractions like 6/6 or 6/20? My eyesight is L: -6.00, R: -5.50 (spherical) + 0.5 (cylinderical at +90 degrees.
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