Reports of this, and having a friend suffer from similar effects after laser eye surgery years ago, have always kept this as a "look again in a few years" thing

Reports of this, and having a friend suffer from similar effects after laser eye surgery years ago, have always kept this as a "look again in a few years" thing for me. As I've aged, my prescription has got stronger (I'm long sighted), and I've realised these effects can be caused by stronger spectacles too. Long term contact lens use can also commonly cause symptoms. With hindsight I wish I'd just gone ahead in my 20s or 30s!