This is really noob question, I was thinking about how eye works and I dont understand this most basic thing.
Imagine a human looking at tiny omnidirectional source of light, like a small LED diode. The light from this infinitely small light source hits our whole eye, it reaches all of its surface yet we dont see our entire vision go white or red or whatever the color of the source is, we just see it as small spark, miniature "pixel", we can see that its small despite the light hitting our whole eye.
Why is that? When I imagine it, no matter how big or small, close or far, a omnidirectional source of light that is directly in front of eye will shine photons to entire cornea/pupil, why doesnt it then also cover our entire vision?