In "The Hard Goodbye", the first graphic novel of Sin City, the cannibalistic serial killer Kevin wears glasses with lenses that often whited out so his eyes are not visible.
The Corinthian in The Sandman (1989) always wears reflective sunglasses, but then, that's really preferable to looking at what he actually has in his eye sockets.
Played straight, however, with Peter Grimm. More of a subversion, since Ray isn't really that bad a guy. When he finally takes them off it's revealed that his eyes are glowing radioactively.
Triple X Ray in Sleeper (WildStorm) has this even in the dark.
The Ax-Crazy protagonist of Welcome to Hoxford has this, and he never takes his glasses off.
As an adolescent, Sara/h from The Maxx is often shown in silhouette with only the blank lenses of her glasses visible.
It's probably to foreshadow his being a Bitch in Sheep's Clothing.
For some odd reason, David in the comic book adaption of Shaun of the Dead has this trope, making him look strangely like Gendo Ikari.
Often for extra effect their bodies will just be a black outline, with the glasses as the only visible detail. When they are in effect, the glasses reflect light such that all you can see are two white circles, nothing is visible of the eyes. The Scary Shiny Glasses can be turned on or off at will by the wearer they can especially crank it up for intimidation. If the symbolism is particularly ham-handed, you can even expect the glasses to be non-prescription lenses, easy to break or take off during a moment of epiphany - or death. If you can't even see their eyes because of light reflecting off their glasses, beware - for these are individuals who deliberately wall themselves off from the people around them. This is because eyes are very important to conveying emotions. Large eyes represent honesty and innocence, while smaller eyes indicate darker personalities. Traditionally, one's eyes are an indicator of one's character. These are definitely not mere Nerd Glasses, although they are sometimes mistaken for them at first.