Retina Analogy Update

     Okay, the retina is the thin layer of tissue that lines the back of the eye, near the optic nerve. The retina receives light that the lens has focused, and sends the neural signal to the brain.
      Way back when, during ophthalmologic training, the students were taught, or at least encouraged, to explain how we see by using the analogy of a camera, citing lens and film, etc.
       Probably those ophthalmologists will continue to cite this age-worn analogy, until a majority of their patients admit they don't get the reference: "What the heck is camera film anyway?"
     Medical training seems to  have been  hard-wired in the brains of its students, maybe because they paid a hefty price for their store of knowledge. Case in point is three separate neurologists using the exact word example to assess a patient's memory capacity: "Spell "world" and now, spell "world" backwards."
               I had the thought, after the second instance, that if I were ever administered the  assessment, I would spell "whirled" but that occasion never came up, not yet anyway.