  While looking for evidence of quantum coherent states within the brain, many
quantum mind advocates proposed experiments based on the assumption that the
coherent state of a photon entering the visual system could somehow be
preserved through the neural processing, or in other words they suppose that
photons collapse not in the retina, but in the brain cortex. In this paper we
show that photons do collapse within the retina and subsequent processing of
information at the level of neural membranes proceeds. Moreover, we explicitly
stress on the fact that due to existent amplification of the signal produced by
each photon, a basic quantum mechanical theorem forbids the photon state to be
teleported from the retina to the brain cortex. The changes of the membrane
potential of the neurons in the primary visual cortex are shown to be relevant
to inputting visual sensory information that is already processed and is not
identical to the visual image entering in the retina. A striking evidence for
the existent processing of the incoming visual information by the retina is
provided by visual illusions resulting from the lateral inhibition mechanism.
