3-D eyewear

A set of eyewear for use with spectacles worn by a user when viewing stereoscopic images, the spectacles comprising a front piece and a plurality of temple pieces, the set of eyewear comprising:

• a substrate forming a first selection device and a second selection device;
• and
• optical materials provided on the substrate, the optical materials comprising:
• first optical material associated with the first selection device and providing a first orientation along a first axis;
• and
• second optical material associated with the second selection device and providing a second orientation along a second axis substantially orthogonal to the first axis;
• wherein the set of eyewear is configured to be slipped onto the front piece of the spectacles in a slip-in, self-locating detachable manner and the substrate and optical materials facilitate viewing of stereoscopic images, and wherein the substrate comprises a linear polarizer substrate and the optical materials comprise a quarter wave retarder.

A set of eyewear for use with a set of spectacles worn by a user enabling relatively clear user viewing of stereoscopic images, the set of spectacles comprising a front piece and a plurality of temple pieces, the set of eyewear comprising:

• a first selection device and a second selection device formed of a substrate;
• and
• optical materials provided on the substrate, the optical materials comprising:
• first optical material associated with the first selection device;
• and
• second optical material associated with the second selection device;
• wherein the set of eyewear is configured to slip onto the front piece of the spectacles in a slip-in, self-locating detachable manner and the first selection device, second selection device, and optical materials facilitate viewing of stereoscopic images, and wherein the substrate comprises a linear polarizer substrate and the optical materials comprise a plurality of quarter wave retarders.