I worked in a building that attempted to address this. The three-story glass lobby had its glass wall raked outwards by 30*. If you approached the glass from inside then your feet would contact it before your face, which really helped at night when outside was brighter than the interior. And birds on the outside would see a reflection of the ground rather than transparent glass. All seemed good. Until a convention of blind people booked the lobby for a meeting. When they approached the building from the outside, their canes did not detect the glass wall prior to their faces smacking into it. We hurriedly erected foot-high barriers so their canes has something to see before impact.