I've seen the same things all my life, you know when you put your hands into fists and push on your closed eyes? Well I started doing that at about 6 years old, in assembly at primary school when we had to "pray" I used to just push on my eyes and see shit.
I see (just doing it now 'cause I can't remember) everything going purple and green then there are like green spirals on a red/purple backgroung spinning around and around, then after about 15 secs they disappear, then it's like looking across the ocean to the horizon and it's purple and green I see that like opens up in the middle and then the pretty spirals come back and just keep spinning until I stop pushing my eyes.
Then afterwards, I open my eyes and everything's white and blurred for about 30 secs.. always used to be blind for a bit after praying in assembly from doing that haha.