Have you used glasses or contact lenses before? I'd guess glasses, from what I have heard from friends who switched to contact lenses they get a similar feeling of cognitive unloading.
Been an almost-entirely glasses person. I've tried contacts before, and the uncomfortableness and hassle of it compared to glasses lead me to abandoning them in favor of glasses. Also, I think I remember contacts not dealing with astigmatism and eye shape irregularity very well, and that was the real selling point for lasik for me.
This is the public group instrumental rationality diary for December 16-31.
Thanks to cata for starting the Group Rationality Diary posts, and to commenters for participating.
Immediate past diary: December 1-15
Rationality diaries archive