Abstract: A lens module includes a barrel and at least one lens. The barrel defines a through hole bounded by an inner circumference surface thereof. The inner circumference surface includes at least one first circumference latching surface. The at least one lens includes at least one second circumference latching surface corresponding to the at least one first circumference latching surface. One of the first circumference latching surface and the corresponding second circumference latching surface is a ring-shaped concave surface, and the other is a ring-shaped convex surface latchable with the ring-shaped concave surface.

Abstract: An eyeglass frame sizing system includes a frame member, a pair of adjustable rims supported by the frame member, each rim including an indicator for indicating a center of the rim, an adjustable nosepiece supported by the frame member, a pair of adjustable temples each supported by one of the pair of rims and a plurality of sensors for detecting positions of the pair of adjustable rims, the pair of adjustable temples and the adjustable nosepiece.

Abstract: A method of fixing an optical member for fixing the optical member to a supporting member, wherein an intermediate member that is fused upon irradiation light is disposed between the optical member and the supporting member. By irradiating the light that is transmitted through the optical member onto the intermediate member, the intermediate member is fused, and the optical member is fixed to the supporting member.