Two eye exams in two months with different results

Question

In May my exam by Dr. A his prescription reads:

Right eye: SPH -125 CYL -25 AXIS 140

My vision was worse (right eye) with these glasses, so I had Dr. A re-examine me with the same results.

In July I went to Dr. B his prescription reads:

Right eye: SPH -125 CYL 50 AXIS 40

I haven’t ordered new lenses yet. I don’t know if this is a big difference or what the data means.

Answer 1

You didn't put the sign in front of the .50 on the July exam.

If that Dr. wrote it in the + form, rather than - like the first one, it would be converted to -0.75 - 0.50 X 130...

So, if it is in the + form, your myopia correction is quite different than the first one, and would make a big difference

If it is also in the - form, like the first one, then the axis of your astigmatism correction has changed by 100 degrees by his findings....which is like " fine tuning", and would make a fair difference also...however, the power is almost the same, if the 2nd prescription is  in the - .50 form already.