power of a spectacle lens is said to be -2D. what does this mean
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You will most likely see a number of different abbreviations along the top. SPH (sphere) refers to the amount of lens power, which is measured in dioptres (D). ... A higher number such as 3.00 can indicate that your eyes are quite oval in shape. AXIS denotes the direction of your astigmatism, measured in degrees.
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Answer:
You will most likely see a number of different abbreviations along the top. SPH (sphere) refers to the amount of lens power, which is measured in dioptres (D).. A higher number such as 3.00 can indicate that your eyes are quite oval in shape. AXIS denotes the direction of your astigmatism, measured in degree
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