Might I suggest replacing the experimental setup with a fast flash a kilometre from the eye and a fast optical gate 500 metres from the eye.  The gate would shut the moment the flash had passed so isolating the light in the gap between the gate and the retina.  It is then certain that vision occurs after the event in the world.  The interpretation is then a matter of cosmology - in a 4D world the vision must be a separate event from the original flash. We can then dispense with flowers, scenes and views.