How comes when its dark you can often see something easier by not looking directly at it?
In: Biology
It’s not easier to see it directly. What kind of eyes do you have?
There are two types of light receptor cells in your eye: rods, which detect light generally, and cones, which detect colours. The central part of your eye is packed with loads of cones to give you sharp colour vision, but cones aren’t as sensitive to light as rods are, which means the peripheral vision (where there are far more rods) is better in darkness than the central part is.
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