An insert assembly for the purpose of an injection mold for manufacturing a first casting mold half of a casting mold for manufacture of an ophthalmic device, wherein the casting mold comprises the first casting mold half and a second casting mold half which in a condition placed onto each other bound a lens cavity, wherein the insert assembly is receivable in an injection mold half of the injection mold and wherein the insert assembly comprises: • an insert assembly end surface (14, 18, 22, 26), which bounds an injection mold cavity of the injection mold for forming the first casting mold half and which extends substantially perpendicular to an axial centerline of the insert assembly; • an outer part assembly (12, 16, 24) which has an outer part assembly end surface (14, 18, 26) which forms a part of the insert assembly end surface (14, 18, 22, 26); • an inner part which has an optically accurately defined end surface which in a mounted condition is substantially adjacent the outer part assembly end surface (14, 18, 26) and which forms a part of the insert assembly end surface (14, 18, 22, 26); characterized by • at least one notch (40, 42) in the insert assembly end surface (14, 18, 22, 26) which forms a bounding structure cavity for forming a bounding structure (208, 210) which is an integral part of the first casting mold half to be formed with the injection mold, such that, in a condition of the first and the second casting mold halves (202, 204) placed onto each other, the bounding structure (208, 210) abuts against the second casting mold half and bounds at least one haptics cavity which links up with the lens cavity, wherein the haptics cavity is so configured that in use of the casting mold, after curing of monomeric material deposited in the casting mold, an ophthalmic device in the implementation of an intraocular lens is formed which comprises a lens and integrally formed-on haptics, wherein the at least one notch (40, 42) is so shaped as to form in the first casting mold half a bounding structure (208, 210) which comprises at least one upwardly projecting ridge (208, 210), wherein the upwardly projecting ridge (208, 210) in cross section has a triangular shape with a sharp top. • an insert assembly end surface (14, 18, 22, 26), which bounds an injection mold cavity of the injection mold for forming the first casting mold half and which extends substantially perpendicular to an axial centerline of the insert assembly; • an outer part assembly (12, 16, 24) which has an outer part assembly end surface (14, 18, 26) which forms a part of the insert assembly end surface (14, 18, 22, 26); • an inner part which has an optically accurately defined end surface which in a mounted condition is substantially adjacent the outer part assembly end surface (14, 18, 26) and which forms a part of the insert assembly end surface (14, 18, 22, 26); characterized by • at least one notch (40, 42) in the insert assembly end surface (14, 18, 22, 26) which forms a bounding structure cavity for forming a bounding structure (208, 210) which is an integral part of the first casting mold half to be formed with the injection mold, such that, in a condition of the first and the second casting mold halves (202, 204) placed onto each other, the bounding structure (208, 210) abuts against the second casting mold half and bounds at least one haptics cavity which links up with the lens cavity, wherein the haptics cavity is so configured that in use of the casting mold, after curing of monomeric material deposited in the casting mold, an ophthalmic device in the implementation of an intraocular lens is formed which comprises a lens and integrally formed-on haptics, wherein the at least one notch (40, 42) is so shaped as to form in the first casting mold half a bounding structure (208, 210) which comprises at least one upwardly projecting ridge (208, 210), wherein the upwardly projecting ridge (208, 210) in cross section has a triangular shape with a sharp top.