Patent ID: 6962413

Claim:
An auxiliary frame for detachably mounting in front of a spectacle frame which comprises a spectacle bridge connected between two spectacle lenses to define a lens distance between two inner sides of said spectacle lenses, wherein said auxiliary frame comprises: a mounting frame supporting two shelter lenses for detachably mounting on said spectacle bridge to align said two shelter lenses with said two spectacle lenses respectively when said auxiliary frame is mounted in front of said spectacle frame; and a retention arrangement, comprising: two guiding members rearwardly extended from two inner sides of said shelter lenses respectively and defined a guiding distance between said two guiding members smaller than said lens distance of said spectacle frame when said auxiliary frame is mounted in front of said spectacle frame; and two urging members provided at rear end portions of said guiding members respectively, wherein an urging distance which is defined between said two urging members is larger than said lens distance of said spectacle frame, such that when said guiding members are extended at said two inner sides of said spectacle lens respectively, said two urging members are adapted for applying an urging force towards said two inner sides of said spectacle lens respectively so as to substantially retain said two shelter lenses in position when said auxiliary frame is mounted in front of said spectacle frame.