Eyewear whose lenses are colored differently from one another. This is the case with the classic form of 3D glasses, but modern ones adopted a different method to convey 3D imagery to the viewer.
Not to be confused with multicolor-tinted eyewear, which has multiple colors on each single lens. Nor with asymmetrical eyewear, which has different (frame) shapes or designs on each lens.
This tag implicates tinted_eyewear (learn more).