Patent ID: 7883205

Claim:
A clip-on glasses assembly mountable on a pair of primary glasses, the clip-on glasses assembly comprising: a frame configured to be mounted in front of the pair of primary glasses; a pair of lens retaining structures, each lens retaining structure in front of and attached to the frame adjacent the other lens retaining structure, each lens retaining structure comprising: an inner portion and an outer portion, each of the inner and outer portions comprising a flexible, resilient member having a predetermined rest position, the inner portion having an inner lens grabber thereon and the outer portion having an outer lens grabber thereon, the inner and outer lens grabbers configured to bearingly engage corresponding features of each of a plurality of lenses, the inner and outer lens grabbers separated by a first distance when the inner and outer portions are in their rest positions, the lens retaining structure operable to interchangeably retain each of the plurality of lenses, the corresponding features of each of the plurality of lenses separated by a second distance that is different from the first distance and different from the distance between corresponding features of the other lenses.