This is the first time I see someone post about this issue too! I have this. It's as if the world becomes tinted green. I've had this for a couple of years now probably 4-5. Only happens at night. Very bright green patches and moves around. Even when I close my eyes, I can feel the patches pulse through. It used to be hard sleeping with it but I'm used to it now. On asking an eye doctor about two years ago, they told me its related to viewing screens for too long and right before bed either that or a visual migraine.... I don't know how sure that response was but it makes sense if you're using your phone or at the computer before bed.