Sorry, I didn't understand your question. Your eye has the astigmatism, what the doctor reads off the lens is the correction required to compensate for your astigmatism and enable you to see without distortion. You might be able to read the 20/20 line without correction, but your astigmatism causes blurriness, and the lens required to correct for that blurriness is what the docs measure. So yes, in a sense, the correction brings you to your "best vision". Does that make any more sense?