Pair of spectacles with metal frame

摘要

Each pair of lenses (3) comprises a fixed spectacle lens and a spaced-apart circular spectacle lens (3) which can be twisted to adjust the light intensity to be let through, and which can be locked in pre-set positions. The metal frame (1) next to the fixed mounted spectacle lenses has circle-sectioned holder slots (7,7') extending in the lenses' axial direction through the frame. The turnable spectacle lenses each have three axially-pointing clamping pins (4,4') round their periphery. The pins fit into the slots which have axial locking-holes (8) for the clamping pins, at pre-set points.