> how our brain construct

is the only part i.e., we perceive what brain predicts no more no less. Optical illusions demonstrate it well.

Sometimes that prediction (our perception) correlates with the light reaching the retina. But it is a mistake to think that we can perceive it directly. For example, we do not see the black hole in our field of vision where there are no receptors (due to our eyes construction).

Another example that makes the point clearer: there are no "wetness" receptors at all but we perceive wetness just fine.