system
Given the following post, respond as if you're commenting on Reddit:
human
If you close your eyes and push on your eyeballs, you see colours and oscillating patterns. Why is this?

Are the rods and cones in your eyes also sensitive to pressure increases somehow? Or is the effect from some other part of the optic system? Or is this like "seeing" pain sensations?
gpt
>Are the rods and cones in your eyes also sensitive to pressure increases somehow?

That's it.  It is one of many examples of neurons receiving non-standard stimulation and responding.  Other good examples include the "hotness" of peppers and "coldness" of menthol: both are temperature sensations set off by chemical interactions.