Eyeglasses include a frame, and two lenses; the frame has a streamline shape, and a relatively large curvature as compared with the lenses, and has a joining portion protruding downwards from a middle portion thereof, and grooves extending from two sides of the joining portion to an upper portion of an inward side thereof; each of the lenses includes a body, and a connecting plate, which is secured on the body, and has the same curvature as the body of the lens; the lenses are firmly joined to the frame with the connecting plates being inserted in respective ones of the grooves of the frame.