the invention provides a disposable plastic mold assembly for an intraocular lens or the optic body thereof , which is inexpensive , less labor intensive than prior art intraocular lens molding techniques , and produces an intraocular lens having smooth , polished edges which require little or no post - mold finishing work . numerous innovative features of the invention include an edge design which assures a seal between the male and female molds to thereby minimize flash during the cast molding operation , and the provision of a way to pre - align the male and female molds during assembly , consisting of an interference fitting relationship between the male and female molds . an additional feature is a way to maintain contact between the male and female molds during casting , which particularly involves the provision of a negative draft angle on the inner surface of the female mold &# 39 ; s outer wall , or , alternatively , texturing which is applied to that inner surface so that it engages the outer edge at the top of the male mold during assembly . yet another important feature of the invention is a structure for achieving axial and rotational orientation to produce lens edge geometries without unwanted steps on the lens edge . the alignment is achieved with interlocking steps on the male and female molds . the interlocking elements may be pins or annular elements .