Glasses construction

A glasses construction, comprising:

• a glasses frame including a frame rim holding lenses;
• a protective frame corresponding in shape to and disposed behind the glasses frame;
• an auxiliary frame sandwiched between the glasses frame and the protective frame and coupled with optical lenses;
• two connecting elements pivotally disposed on two sides of the glasses frame, respectively;
• and temples each disposed at an end of a corresponding one of the two connecting elements;
• wherein receiving spaces are formed on outer sides of the frame rim;
• wherein a notch is disposed in the frame rim at a margin of each receiving space, wherein hook portions extending forward from two opposing outer sides of the protective frame are inserted into the receiving spaces, wherein abutting portions formed on inner sides of the hook portions are inserted into the notches, respectively, wherein a downward-facing abutting space is formed at a middle portion of the protective frame, wherein upon engagement of the protective frame and the glasses frame, a corresponding portion of the frame rim of the glasses frame is inserted into the abutting space, and thus a convenient operation whereby the glasses frame is mounted on or dismounted from the protective frame is advantageously characterized by stable positioning or separation.