FTN â **** the Navy. Commonly used as graffiti in hard to find places as a type of game. While there are no clear objectives, the result of upsetting officers constitutes a type of victory.
Bifocals, are eyeglasses with two distinct optical powers, Bifocals are commonly prescribed to people with presbyopia who also require a correction for myopia, hyperopia, and/or astigmatism.
Bifocals and trifocals have visible lines, but the line in a round-seg bifocal tends to be less noticeable than the lines in flat-top and Executive styles. There is something called an invisible bifocal, which essentially is a round-seg bifocal with the visible line buffed out.