Somewhat related - I made the mistake of putting effort into learning how to stereo free-view Google Cardboard / Daydream VR apps. At the time it was kind of interesting what it felt like.
Except I must have made something super-sensitive in my visual system, to the point where now it’s almost TOO easy to stereo-fuse repeated patterns — though having said that, my visual system is kind of different I think anyway. Now if I see repeated patterns I’ll start getting phantom stereo fusion if I keep my eyes looking at one spot and relaxed too long. It’s not distressing or anything, it’s just really unusual.