I also experienced fucked up vision, although I was on high dose pregabalin, lots of benzo's and 80mg ritalin with beer and weed added for good measure
I had to close an eye to see in any kind of proper way and the pc screen and my vision went blank/black a few times. I was also experiencing hallucinations, hearing people who weren't there and I was moving things around randomly. I think I ended my night with a benzo blackout possibly? I took 10mg Valium, 1mg Etizolam and 60mg Temazepam when I got home. I fell over in my room apparantly and I kinda remember feeling like I was going to spasm. Drugs are bad mkay