They are made from lightweight materials including titanium, aluminium and acetate, and as a result should be very comfortable.

Some frames have a grid pattern on the rim that mimics Merc’s familiar slatted grille. The top-of-the-range specs feature special graduated ‘Skylet Road’ lenses, which provide maximum shading of 80 per cent at the top. Other models have polarized lenses to help reduce glare.

The Mercedes glasses are available at selected opticians, priced from £105.