A method includes preparing design variations, which include a plurality of basic design distribution groups different from each other in area-division between a distance vision area and a near vision area, and a plurality of corridor lengths different from each other. Parameters originating from prescription information, life environmental information, frame shape information and the like are input. A basic design distribution group and a corridor length are selected based on the aforesaid information. A lens design standard is obtained based on the selected basic design distribution group and corridor length. As parameters, a distance between a vertex of a rear surface of a right progressive addition lens and a vertex of a cornea of a right eye and a distance between a vertex of a rear surface of a left progressive addition lens and a vertex of a cornea of a left eye are included in setting elements.