That's exactly what happens when the retina is damaged. The brain fills in the void imperceptibly so you aren't distracted by the deficit. But I think biology

That's exactly what happens when the retina is damaged. The brain fills in the void imperceptibly so you aren't distracted by the deficit. But I think biology doesn't fill in the void synthetically. It's more likely that the brain "turns a blind eye" toward the missing 'pixels' and directs your attention elsewhere, perhaps to those remaining regions with high saliency (useful detail).