Abstract: A plurality of to-be-evaluated lenses that differ in lens surface design from one another is prepared in an evaluation-value calculating step. Thereafter, a subject's predetermined biological information, e.g., brain waves, is measured for each of the to-be-evaluated lenses by allowing the subject to wear each of the lenses, and an evaluation value for each of the lenses is calculated relative to a predetermined index in the brain waves, for example, relative to a “state of being under stress.” Thereafter, a correlation between the calculated evaluation value and a lens surface shape is calculated as an index characteristic in a lens-surface-shape determining step. Thereafter, a lens surface shape of a suitable spectacle lens in the index is determined based on the index characteristic, and the lens surface shape is fed back as a shape of a to-be-evaluated lens of the evaluation-value calculating step.

Abstract: An opening and closing support mechanism includes: a main body; an opening and closing member; and a support member includes: a first joint support portion that curves to deform when the opening and closing member is closed, and extends straight when the opening and closing member is opened; and a projection portion that projects to an opposite side of a curving side of the first joint support portion at a side of either one end portion or the other end portion of first joint support portion when the opening and closing member is closed, and is elastically deformed in a direction of approaching the first joint support portion while pressed against a portion of the main body or opening and closing member when the opening and closing member is opened, and the support member being fitted between the main body and the opening and closing member.

Abstract: A plurality of to-be-evaluated lenses that differ in lens surface design from one another is prepared in an evaluation-value calculating step. Thereafter, a subject's predetermined biological information, e.g., brain waves, is measured for each of the to-be-evaluated lenses by allowing the subject to wear each of the lenses, and an evaluation value for each of the lenses is calculated relative to a predetermined index in the brain waves, for example, relative to a “state of being under stress.” Thereafter, a correlation between the calculated evaluation value and a lens surface shape is calculated as an index characteristic in a lens-surface-shape determining step. Thereafter, a lens surface shape of a suitable spectacle lens in the index is determined based on the index characteristic, and the lens surface shape is fed back as a shape of a to-be-evaluated lens of the evaluation-value calculating step.

Abstract: An opening and closing support mechanism includes: a main body; an opening and closing member; and a support member includes: a first joint support portion that curves to deform when the opening and closing member is closed, and extends straight when the opening and closing member is opened; and a projection portion that projects to an opposite side of a curving side of the first joint support portion at a side of either one end portion or the other end portion of first joint support portion when the opening and closing member is closed, and is elastically deformed in a direction of approaching the first joint support portion while pressed against a portion of the main body or opening and closing member when the opening and closing member is opened, and the support member being fitted between the main body and the opening and closing member.