Why is peripheral vision clearer at night than focused vision?

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I was looking around my room at night in the dark and realised that looking at something in the corner of my eye made it clearer than looking directly at it.

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The part of your eye that collects light (the retina) has different kinds of cells in it. The center or the retina, called the fovea, is mostly color vision cells (cones). Can’t see color without good light, and our cones are adapted to seeing in bright light and being very clear, so you can do stuff like read and hunt or whatever.

As you move to peripheral vision, there’s less cones and more rods. Rod cells are good at low light conditions, but they can’t see color (which is fine bc you can’t see color in the dark anyway) and aren’t as good at focusing (they’re blurry). 

So when there isn’t much light, your peripheral vision is better because it uses more rods than your central vision.