Guys, The way I would express it is: to sense is physical and to see is psychological. Insects and other organisms sense UV or IR which we cannot. At least not with the usual rods and cones - perhaps we have other unrecognized and undeveloped senses with which to "see." But what the #%?&&# do I know? Another intriguing thought about seeing - (OK, Santa brought me a Richard Dawkins book) - eyes have evolved from scratch in different organisms over the aeons at least forty to sixty times. There are around nine unique "eye" designs. Surprisingly it takes relatively few generations, by evolutionary standards of time, for an eye to evolve from a plain patch of skin. AZ Build a Lookaround! The Lookaround Book, 2nd ed. NOW SHIPPING http://www.panoramacamera.us > -------- Original Message -------- > Subject: Re: Virtual Colour Museum > From: "Bob Talbot" <BobTalbot@xxxxxxxxxxxxxxxxxxx> > Date: Sat, December 25, 2004 5:48 pm > To: "List for Photo/Imaging Educators - Professionals - Students" > <photoforum@xxxxxxxxxxxxxxxxxxxxxx> > > > I interpreted Bob's question to be "physical" (outside of the brain) > and > > "inability to interpret" (inside the brain). Both are actually > physical and most > > color blindness as you say is inherited. > > Hey, it was only an aside ;o) > > Physical, in the sense used, would mean that the retina lacked a > certain class of cones making it impossible to distinguish between > certain tones. > Reading a little this seems to be the main explanation > > "Ability to Interpret", whilst still arguably physical, could have no > identifiable defect - oh heck, "Synaesthesia" comes into the same > category ... it's in the brain things get muddled.
