For example, as I type this, I can look through my phone and see the trees and leaves behind my phone. But if I try to look through the wall, I can’t no matter how I zoom my eye lens.
What is going on here? Can I only look through objects that have a certain thickness but not others? In other words is the wall too thick to look through and my phone only being about a centimeter thick is thin enough to look through?
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You’re not looking through it, you’re looking around it. Our eyes are constantly processing the 2 points of view into what we perceive as 1 singular image. If you put something closer than your focal length, your eyes are literally just looking at what’s behind it, and it only exists in your peripheral vision.
This is why we can cross our eyes, but doing the opposite is almost impossible.
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