system
Given the following post, respond as if you're commenting on Reddit:
human
Why does it take so much longer for the eyes to adapt to darkness than to brightness?
gpt
When going from dark to light, all your eyes have to do is constrict the pupils to restrict the incoming light to a range that allows proper vision.

When going from light to dark, 2 things need to happen. The fast step is (like above) dilation of your pupils to their maximum size to allow as much light in as possible. The slower step is regeneration of rhodopsin (what the other commenter called visual purple), the light-sensitive protein in your retina, which takes 30-60 mins.