If you are looking for a great gift for Fathers Day, consider a pair of sunglasses; the sun is going to be out whether your guy wears prescription specs or not, and a nice pair of sunglasses may be had for a very reasonable cost.
Your guy doesn't have to be an aviator to appreciate these Armani Exchange Metal Aviator's Sunglasses ($65), made in the classic pilot's style, with a rugged double bridge and adjustable nosepads for lengthy wear comfort. The monochrome lenses offer 100% protection from the harmful rays of the sun and the wide temples reduce the pressure on the wearer's ears. Free shipping and return, and a one year (limited) warranty. Wearing these sunglasses, a husband or father will feel right at home in the cockpit or barbeque pit.