When your iris changes in size from light why does does the area we can see not change?
In: Biology
What matters for the area we see is the angle of the light rather than the size of our pupil. I made a quick photoshop diagram [showing the path light would take if you were looking at a red dot right in the corner of your vision](https://i.imgur.com/nFAqd0I.png) for different pupil sizes.
It doesn’t matter whether your pupil is big or small, the light still has the same path to the same part of your retina.
There is a bit more to it as well, as the lens in your eye is also bundling up all the light that hits it so not even the edge of your vision would get cut off by your pupil because any light coming from that angle that hits any part of your lens gets bent through the lens and spat back out going in the correct directly.
It’s all just like how a [camera lens aperture can change from massive to tiny](https://houseofroseblog.com/wp-content/uploads/2013/04/aperture-post-2.jpg) and still capture a complete image.
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