Your hero's eyes just aren't what they used to be. With glasses, there's no penalty and the Hindrance is only Minor. Should he lose his glasses (generally a 50% chance when he's wounded, or no chance with a “nerd-strap”), he suffers a -2 penalty to any Trait roll made to shoot, [ throw ], or Notice something more than 5“ (10 yards) distant.

In low-tech settings where the hero cannot wear glasses, Bad Eyes is a Major Hindrance. He must subtract 2 from Trait rolls made to attack or notice things 5” or more away.

Savage Worlds Deluxe Edition p. 29