Had a converstion along these line with my optician a few months ago. He said it depends how your prescription is written.
R = +4.75 / -2.25 ASTG
L = +5.25 / -2.25 ASTG
I think that in the above you would no nock off the astig. and come out at 2.5 & 3.00. You're still out by a 0.25 and over on the astig. Get another eye test. I had mine done again and my prescription came out 1.0 less in my left and 0.5 less in my right. Made the difference needed.
Good luck
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