Huh? LASIK isn't a treatment for cataracts. The surgeon removes the lense and implants an artificial one.
https://www.aao.org/eye-health/diseases/what-is-cataract-sur...
https://www.aao.org/eye-health/diseases/what-is-cataract-sur...
My Dad says shit that he makes up in his own head by reinterpreting what others have told him and I just believe him without bothering to verify unless I know it's incorrect; and even then sometimes I just don't bother.
For instance, in this case he probably saw or heard the term LASIK so much by advertising that it just stuck in his head and he glazed over whatever the doctors were telling him when he went in, and he's been repeating that same thing ever since. I believed him, because I don't have eye problems and was never curious enough to look further.
Shame on me.
Your dad sounds like one of these annoying non-technical people who hears one technical term (e.g. LASIK) and then applies that in blanket fashion to anything remotely related. He probably calls Android phones "iPhones", and he probably calls laptop computers "iPads", and he probably calls the Internet "AOL".