Can Axis measurement change?

[skifvr]

My prescription has changed especially the Axis number.  Isn't that the spot of your astigmatism?  Can it change? Seems like every year someone else does the testing but there is quite a difference in 56 and 175.  Should I ask for a "re-do"?
2012:
OD: Sphere -.25        Cyl 0.25    AXIS 175
OS   Sphere -.50       CYL -1.00  AXIS 180

2013:
OD: Sphere PL         CYL 0     AXIS 0
OS: Sphere -.50        CYL +1.25  AXIS 0

2014
OD: Sphere: PL        CYL +.25  AXIS 056
OS: Sphere -0.75      CYL +1.00  AXIS 005

[Timothy D McGarity, M.D.]

The amount of astigmatism (Cyl) at axis 56 (+0.25D) and 175 (+0.25D) is fairly negligible as is the lack of astigmatism is 2013 for the OD (right eye).
OS is a different story: you went from -1.00D to +1.00D which amount to a 2D magnitude difference...that's huge; the axis didn't change much, but the magnitude did. I would go in and get this checked for an error.

Best wishes,
Timothy D. McGarity, Medical Doctor, Ophthalmologist

[Timothy D McGarity, M.D.]

Hi,
Axis can change, but your astigmatixm isn't going to amount to much.
Tim