A few years back I was still using a CRT screen and I used to degauss it quite often as a result of having my speakers right next to it. Nowadays I use an LED screen but now I started getting this kind of "degaussing" effect where my vision shakes and waves and I get it quite randomly when looking at lights of different frequencies. (Like the Sun and my phone's screen) It only lasts like 2 seconds at most but I'm wondering if someone has the same problem as me and I would be quite interested to know if this has been caused by the CRT screen or something else.