system
Given the following post, respond as if you're commenting on Reddit:
human
How come glow in the dark objects are easier to see using peripheral vision?

I have a few glow in the dark things in my room, but I usually cannot see them glow when I stare directly at them. When I look away, their intensity increases and I can see them using only my peripheral vision. What is going on?
gpt
Color sensing cone cells in the eyes are clustered toward the center of the retina, giving us better resolving power in the focus of our sight. However cone cells have a weakness; they are not as sensitive to low light levels as rod cells which can only sense monochrome. At the edges of our retina the proportion of rod cells goes up and thus our sensitivity in low light conditions.