Have had cataract surgery in both eyes....plus.
First eye: cataract repaired, sight o.k. Then a year or so later, had a detached retina in that eye. That's REAL scary since it is instantaneous total loss of vision! Woke up one morning with the top half of the vision totally gone, like a shade having been pulled down. I was on the table within 48 hours and had it repaired. Now: vision in that eye is 20/20!
Second eye: cataract repaired, vision worse than before. Dr. said I had pterygium, a non-cancerous growth on the surface of the eye that may interfere with the vision. He said that he wanted to do the cataract repair first, hoping that the pterygium would not affect my vision. Wrong decision. Had to have the pterygium removed (a VERY painful recovery, far worse than any of the others!) and then see about the cataract again. As it turned out, he had to remove the original cataract repair and use a different one. Vision in 20/25 now in that eye with a residual flaring effect when viewing bright objects.
Vision now is quite good. Distance vision needs no correction, I wear bi-focals since I need correction for up-close work. Use amber sunglasses (Cocoon brand) over my regular glasses when in bright settings. Don't have my eyesight to blame for a bad pit! :-)