Hi, i'm a 21 year old university student and since early January i've had HPPD. It's started from ketamine use, when I used to do k I could feel the tinnitus and my vision would turn into this visual snow but after the trip it would wear off. One morning I woke up after a trip and it hadn't subsided and has remained ever since. It's hard to revise and concentrate with brain fog and the words almost shaking and I fear that it's going to affect my exams/future. Does anyone have any tips to get around brain fog or even just be able to focus on words on a computer screen without them shaking and flashing?