I've had the bad luck that my first prescription was quite wrong: incorrect axis for astigmatism, and incorrect spherical (I basically have only astigmatism, no spherical). So for years I was suffering through the days. Optometrists flat out refuse to correct such mistakes (I've been to many!), preferring only minor changes. I finally started ordering a bunch of glasses cheaply online, and eventually found a prescription that works for me. Cannot trust optometrists anymore.