A good example of this is when you’re looking at semi reflective glass windows, you can focus on the reflection you’re obviously seeing but the actual glass characteristics can be a little blurry, but then you can change your focus and the reflection becomes blurry but now you can see the glass characteristics such scratches on the surface for example.
How does the human eye do that?
In: Biology
Think of your eyes like a monocular. You can zoom in or out to adjust the focus. Your eyes have muscles that do that. They squeeze and relax your eyeball to make it longer or shorter.
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