The Broken lines in the drawings are shown for the purpose of illustrating portions of the smart spectacles and form no part of the claimed design. Additional color and texture may or may not form part of the claimed design without departing from the design disclosed. The invention can be any part, portion, element, or combination of elements of the depicted design. The addition of further physical elements such as writing, markings, ribs, ridges, textures, and/or dimples are not excluded. Any part, portion, element, or combination of elements of the depicted design or designs which is novel may represent an invention or design for which protection is or may be claimed in the future.