From Tea From An Empty Cup (1998) by Pat Cadigan:
In the next moment, Tom was gone and she was staring at a regular-style reflection. Or as regular-style as a reflection in Artificial Reality could be, considering it wasn’t really a reflection of something that wasn’t really there in the first place. Or was it? Maybe reflections were sort-of reflections, subroutines dumbed-down to the point of the AR version of an automatic reflex.