the brain simply “fills in” the missing information. In other words, our brain actually hides our blind spot from us
Every eyeball has one spot where the nerve bundles gather, negating the possibility of light sensors at that point. We're typically unaware of this blind spot. As I stared at the door, in the location where I knew the missing doorknob to be, I was fascinated to note that the simulated wood grain was complete, running throughout the door, even through the blind spot with no discontinuities whatsoever.