Abstract: It is an object of the present invention to provide a contact lens mold unit that is capable of easily and consistently provides a sealing in a mold cavity as well as a mating and fixing force to maintain a male and a female mold in a mated state. A male mold and a female mold are mated to form a contact lens mold cavity 16 between abutment surfaces thereof. One mold 14 is provided with a fitting projection 42 projected out from a fitting wall 34. When mating the molds, the fitting projection 42 is caused to deform by being pressed against a fitting wall 22 of the other mold 12, whereby the peripheral portion of the mold cavity 16 is closed off, and a gap 14 between the fitting walls 22, 34 of the female and male molds 12, 14 are filled by the fitting projection, exerting a mating and fixing force.

Abstract: A mold assembly for forming an ophthalmic lens, the mold assembly comprising a first mold and a second mold which cooperate with each other to define therebetween a mold cavity having a profile following that of the ophthalmic lens, wherein the improvement comprises: at least one of the first and second molds being a coated mold consisting of a body portion including a backing surface having rigidity and mechanical strength enough to withstand a molding operation for forming the ophthalmic lens in the mold cavity, and a thermoplastic film retained on the body portion such that the thermoplastic film covers the backing surface of the body portion, the thermoplastic film having a molding surface which partially defines the mold cavity and which gives a corresponding one of opposite surfaces of the ophthalmic lens.

Abstract: Lens mold assembly including a first and a second mold cooperating with each other to define a mold cavity for molding an ophthalmic lens with the first and second molds being held in line contact with each other at a radial position, wherein at least one of the two molds consists of a central molding portion located radially inwardly of the radial position, and an outer rim portion located radially outwardly of the radial position, the central molding portion cooperating with the other mold to define the mold cavity, the above-indicated at least one mold having a mold surface which is opposed to a mold surface of the other mold when the two molds are assembled together, the mold surface of the at least one mold consisting of a central lens-forming region in the central molding portion, and an outer peripheral non lens-forming region in the outer rim portion, at least a part of the lens-forming region adjacent to the radial position providing a concave portion, while at least a part of the outer peripheral no