Abstract: A pair of eyeglasses includes two temple pivotal bases respectively connected to the opposite sides of a lens frame, and each temple pivotal base has its front side formed with a recessed surface. Two cover-position members are respectively and pivotally assembled on the recessed surface of the temple pivotal base. The lens frame has the opposite portions near a bridge respectively provided with an arc-shaped recessed groove for fitting a lens therein. To assemble a lens on the lens frame, simply turn open the cover-position member, fit the lens in the recessed groove through the recessed surface and then close pivotally the over-position member on the recessed surface to finish assembly of the lenses.