Do people who can see still see when they grow up?

My husband said he could see things when he was a child, but not anymore. However, it seems like his younger brother, the youngest of his two brothers, can still see? Several years ago, my husband's mother passed away, and we held the wake and funeral at a nearby memorial service hall. They offered us a private room until the bathing and coffin dressing, saying it would be fine for someone to stay overnight to watch over the fire. That's when it happened. My brother-in-law offered to stay, so we entrusted him with the task and went home. The next day, during the coffin dressing, my mother-in-law's sisters also came. I suggested a chair by the window for one of the sisters who had trouble with her legs, but for some reason, she refused. So, I placed another chair next to the coffin for her to sit. That's when it happened. My brother-in-law said: "The old lady is sitting there." He always called his mother "old lady," so I immediately knew he was referring to his mother... Ah... I see... Then, last year, my father-in-law also passed away, and something strange happened then too. I'll tell you about that another time.