"Some physicists have suggested that such experiments could test whether a superposition of two states could survive in a person's sensory system, and perhaps b

"Some physicists have suggested that such experiments could test whether a superposition of two states could survive in a person's sensory system, and perhaps be perceived in the brain." This sentence surprises me. I would have thought that maintaining coherence during the interaction with someone's eyes would be impossible. Does anyone know anything in more detail about this part?