How do you wear glasses in a motorcycle helmet?
Put on helmet first, feed glasses through the visor. Thin arms and the shallower the ear hook the better. Avoid polarized lenses, they don’t react too well behind the visor. For safety, plastic lenses rather than glass. Use an anti-mist cleaning formulation otherwise you will get fogging that is difficult to move quickly and safely. Recommend a ‘Fog City’ or similar visor demister too.