How to read your glasses prescription

০৭ নভেম্বর ২০২৬১ মিনিটে পড়ুন

SPH, CYL, AXIS, ADD and PD in plain words.

SPH is the main lens power, CYL and AXIS describe astigmatism, ADD is extra reading power and PD is the distance between your pupils. Only your optometrist can say what your numbers mean for you. This is general information, not medical advice.

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