An 80-year-old man didn't realize he had accidentally shot himself through the head and spent 10 days suffering blurred vision before going to see a doctor, police reported.

The doctor found a bullet hole in his skull."It was practically a miracle that he survived," Sgt. Roy Bowman of Waterloo Regional Police said.

Evidence suggests the man was walking upstairs at his home with a small-caliber gun in his hand when he fell, the gun went off, and the bullet went through his head. But the man had no memory of the shooting.

"With the trauma . . . he didn't realize or remember it had happened," Bowman said.

When the man went to a doctor, only a small mark above his eyebrow showed something had happened.

Close inspection revealed it to be a bullet hole, and a search of his home found the slug embedded in a wall.