How 3-D Works, In Non-Headache-Causing 2-D

Stereoscopic imagery is over a century old, and we still can’t remember how it works. And if we sit too long trying to figure it out while watching blue dudes in a forest, we’re likely to get sick. Before we can’t open our eyes without things boinging into our faces, let’s lay our old-fashioned eyes on this spiffy diagram.

via OnlineSchools.org