Eye surgeon here. Good job and interesting story! As a side note: for optical reasons, the spherical equivalent of the lens (which will determine if you are o

Eye surgeon here. Good job and interesting story! As a side note: for optical reasons, the spherical equivalent of the lens (which will determine if you are overcorrecting or not) is calculated by adding the sphere value + half the cylinder value (whatever the axis value). You ended with a correct prescription as far as I can tell by looking at the different measurements , however you did not totally grasped the optical subtleties of the accomodation process : astigmatism is important (a small overcorrection is not a big deal anyway) It is usual to undercorrect the cylinder values given by the autoref and your ophthalmologist would have given you the right prescription I think. I'm just saying that to underline that as I doctor myself, I'm usually very wary at thinking that I can fully understand, in a few days, what my colleagues do. I'm totally into the hacking spirit but let's stay careful, especially for more dangerous things than glasses.