What is the Oculus

From Oculus

The 'Oculus' was referred to originally as an opening to peer through, leading to the Rabbithole site 00112358.net.

It can be considered a synonym for a 'looking glass' in the case of ARGs, as a nod to Alice in Wonderland, and a well-known phrase to ARGers defining the lead-in process or event to the ARG itself - the alternate reality.

Definitions

Oculus is defined as:

глаз; изображался на правой и левой скулах корпуса за форштевнем на большинстве кораблей Средиземноморья

Eye; it was represented on the right and left cheekbones of the case for forshtevnem on the majority of the ships of the Mediterranean

src: The American Heritage® Dictionary of the English Language, Fourth Edition

n. pl. oculi An eyelike opening or ornament, especially: A) A round window. B) A circular opening at the apex of a dome.

src: The American Heritage® Stedman's Medical Dictionary

n. pl. oculi Eye.

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The 'Ocular Effect'

The resulting visuals of peering through an oculus, an eye-like opening. In a mysterious setting such as this, obviously intended to spawn intrigue and interest :).