"That's no good," sighs Arthur. "Your brother is a hundred and three. He can't help."
"He may be a hundred and three," says the wife, "but his eyesight is perfect."
So the next day, Arthur heads off to the golf course with his brother-in-law.
He tees it up; takes an almighty swing and squints down the fairway. He turns to the brother-in-law. "Did you see the ball?"
"Of course I did!", says the brother-in-law. "I have perfect eyesight."
"Where did it go?", asks Arthur.
"Can't remember."