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How To Read Eyeglass Prescription?

OD = right eye OS = left eye OU = both eyes SPH = sphere power for nearsightedness or farsightedness Minus sign (-) = nearsightedness Plus sign (+) =...

How To Read An Eye Prescription?

Find the labels for each eye: OD, OS, or OU OD means right eye OS means left eye OU means both eyes Look for SPH or Sphere SPH shows...

How To Read A Glasses Prescription?

OD = right eye OS = left eye OU = both eyes SPH = sphere; lens power for nearsightedness or farsightedness Minus sign (-) = nearsightedness Plus sign (+)...

How To Measure Pupil Distance?

Stand about 8 inches from a mirror Hold a millimeter ruler against your brow Close your right eye and align the 0 mm mark with the...

How To Measure PD?

Use a PD ruler or millimeter ruler Stand about 8 inches away from a mirror Keep your head straight and look at your reflection Close your right...

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