A pair of eyeglasses has a flip-up lens assembly The flip-up lens assembly includes a connector having a base with left and right extensions which are pivotally connected at their respective distal ends to an upper part of right and left sections of a secondary frame which retain a pair of flip-up lenses. A nose bridge of a primary frame which retains a pair of primary lenses includes a first magnet and the base of the connector includes a second magnet such that the flip-up lens assembly can be removably attached to the primary frame when the base of the connector is secured to the nose bridge of the primary frame by magnetic forces between the two magnets.