When your iris changes in size from light why does does the area we can see not change?
In: Biology
The area you see depends on how far the iris is from the retina in the back of an eye. it’s the same in a camera except they are using special lens elements that distort distances to get the same effect. Two thing do change when the iris changes size: (1) the amount of light that comes in, and (2) how fuzzy the out of focus stuff is. The reason eyes have an iris is for the amount of light. That’s how you can see in dark places and bright places. You won’t notice out of focus fuzziness much because even wide open at night, your iris is still quite small.
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