Eog

The most potent magical material in the RPG system Rolemaster. Eog is a black metal that is almost indestructible, and weapons or armor made from it (it can be forged only through extremely powerful magic) have a bonus of +30. Eog is, of course, also extremely valuable.

electro-oculogram

EOG is an electric potential from the eyes, measured by electrodes attached to the skin around them. The EOG-apparatus reports eye movements, and is frequently used to detect REM sleep.