Abbreviations Explained: SPH or Sphere Alludes to the measure of circular error for your eyes, measured in quarters and followed by a (+) or (-). A (+) indicates that the prescription is for the farsighted while the (-) refers to the nearsighted. ...
Glasses: Cons They can distort vision, especially at the edge of the lens if you have a strong prescription orastigmatism. It also can be hard to see in the far periphery or sides of your vision depending on the frame you choose. You may not like the weight of the glasses on your nos...
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