system
Given the following post, respond as if you're commenting on Reddit:
human
What is happening when you press on your eyes and see patterns and colors?

You know like when you close your eyes really hard and press down on them for a few seconds you start seeing crazy patterns and colors, can somebody explain what exactly is causing this?
gpt
Basically, you are manually stimulating the neurons in your eyes that detect light and color, causing them to fire off randomly. Your brain interprets these firings as actual input, and thus produces crazy patterns and colors.