As observer looks in a plane mirror, mirror reflects observer top, bottom, right, and left at observed top, bottom, right, and left. Observer faces in opposite direction from reflection, reflection right arm is observer left arm, and reflection left arm is observer right arm, as if observer went through mirror and turned front side back (inside out) {mirror reversal}.
no inversion
Reflection through one point causes reflection and rotation (inversion). Inversion makes right become left, left become right, top become bottom, and bottom become top. Plane mirrors do not reflect through one point.
rotation
If an object is between observer and mirror, observer sees object front, and mirror reflects object back. Front top is at observer top, front bottom is at observer bottom, front right is at observer left, and front left is at observer right. Back top is at observer top, back bottom is at observer bottom, back right is at observer right, and back left is at observer left. It is like object has rotated horizontally 180 degrees. Mirrors cause rotation {mirror rotation}. 180-degree horizontal rotation around vertical axis exchanges right and left. 180-degree vertical rotation around right-left horizontal axis exchanges top and bottom. 180-degree vertical rotation around front-back horizontal axis exchanges right and left and top and bottom.
mirror writing
If a transparent glass sheet has writing on the back side facing a plane mirror, observers looking at the glass front and mirror see the same "mirror" writing. People can easily read what someone writes on their foreheads, and it is not "mirror" writing. People can choose to observe from another viewpoint.
eyes
Because mirror reversal still occurs using only one eye, having two horizontally separated eyes does not affect mirror reversal. Observing mirror reversal while prone, with eyes vertically separated, does not affect mirror reversal.
reporting
Mirror reversals are not just verbal reports, because "mirror" writing is difficult to read and looks different from normal writing.
cognition
Because mirror reversal occurs even when people cannot perceive the mirror, mirror reversal does not have cognitive rotation around vertical axis. People do not see mirror reversal if they think a mirror is present, but it is not.
Consciousness>Consciousness>Sense>Vision
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Date Modified: 2022.0224