What does axis mean on my prescription?
Axis is part of your prescription, and tells an optometrist in which direction they must position any cylindrical power in your lenses (required for astigmatism). The number shows the orientation or angle (in degrees) from 1 to 180. The number 90 means vertical position, and 180 horizontal. A higher number for the axis does not mean that your prescription is stronger – it simply describes the position of the astigmatism.
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