Hello,
Spherocylinder number do change.
But according to the power that you have written in your description it's a minor change. So in my opinion .. you can withhold the corneal topography, with due respect to the other doctors opinion of doing it, as everybody has a different way of working. Regarding your different readings at different places.. there are many factors that come into play- the time of the day you did the test..how much of dryness in your eyes.. what machine used etc..which should not be bothersome as the difference would not be that much. I always tell my patients that glass power is not maths.
So dont worry
Next Steps
change your glasses
Health Tips
take necessary precautions for your eyes as you have long time of exposure to the screen