Spectacles, spectacle frame, and position adjustment mechanism

A position adjustment mechanism that adjusts positions of a pair of left and right variable focus lenses as ophthalmic lenses included in spectacles comprising:

• an adjusting operation portion that receives an adjusting operation to adjust the positions of the pair of left and right variable focus lenses;
• two moving portions that move each position of the pair of left and right variable focus lenses in respective predetermined directions by an operating force of the adjusting operation received by the adjusting operation portion;
• and
• a switching operation portion that receives a switching operation,
• wherein
• each of the two moving portions comprising:
• a shaft member that is rotatably supported around an axis by a bridge portion of the spectacles and is formed with a ridge in opposite direction to the other moving portion;
• and
• a lens-holding portion that holds one of the pair of left and right variable focus lenses and screws into the ridge of the shaft member, and
• wherein an all-transmission state in which the operating force is transmitted to all of the two moving portions and a partial-transmission state in which the operating force is transmitted only to one of the two moving portions are switched in response to the switching operation received by the switching operation portion.