Is it normal for an optometrist to prescribe a patient contact lense prescriptions that vary between astigmatism and non-astigmatism?

Basically I'm not sure if I'm comfortable wearing toric lenses. I have astigmatism in one eye and have tried toric lenses before and I can't stand wearing them. I'm still in the trial phase and did not like the Acuvue lenses and am still waiting for my Avaira Vitality trial lenses to arrive. A non-toric lense for my left eye was ordered, as well as a toric lense to see which one was more comfortable/clearer. My optometrist gave me two prescriptions for Avaira Vitality and Avaira Vitality Toric which are as follows: 1st prescription (non-astigmatism lenses for both eyes) Right: Power -3.00, Cylinder -0.00, Axis 000, Base Curve 8.40, and Diameter 14.20.
Left: Power -4.00, Cylinder -0.00, Axis 000, Base Curve 8.40, and Diameter 14.20.
2nd prescription (astigmatism in left eye) Right: Power -3.00, Cylinder -0.00, Axis 000, Base Curve 8.40, and Diameter 14.20.
Left: Power -3.00, Cylinder -0.75, Axis 160, Base Curve 8.50, and Diameter 14.50.
So basically is it normal for the prescription for the left eye to change from -3.00 to -4.00 based on it being a toric lense or not?

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Is it possible to get corrective lenses without a doctor to prescribe them?

I know that it is possible to get lenses that will help with reading at pretty much any store; however, I need lenses for correcting normal vision. I have been to the eye doctor recently, and they checked my vision and found a small prescription in one of my eyes. Due to it being so small, the doctor didn't even write it down, so I was unable to get the prescription when I called later. I know the prescription strength, is there anyway to order them without a doctor?

Read more: Is it possible to get corrective lenses without a doctor to prescribe them?