https://en.wikipedia.org/wiki/Troxler%27s_fading
https://www.medicalnewstoday.com/articles/325697#Brain-activity-in-those-prone-to-boredom
https://www.aoa.org/healthy-eyes/eye-and-vision-conditions/nystagmus?sso=y
https://www.eyemichigan.com/why-is-my-vision-blurry-sometimes/
https://www.ultralase.com/blog/what-causes-bloodshot-eyes/
https://childmind.org/article/first-episode-psychosis-early-treatment-critical/