To "s&r",

I suspected, when I started this thread, that someone would come in and post some real technical stuff. And that is good. If I tell you where I have learned about my absence of color vison, will you promise NOT to laugh!

I am fisherman. I fish the rivers in the great NorthWest for the elusive STEELHEAD. I have caught my share ... I really have! In my pursuit of these almost mythical monsters, I have researched some. Some years ago, I learned that color vision, as it applies to fish, and apparently to me also, has to do with "RODS and CONES."

These are the things that are, or perhaps they are NOT, within your eyeballs that enable you to see what is assumed to be the normal range of color vision.

Obviously, I do not have the expected number of rods and cones. If there are eye/doctor/scientists out here, I would really appreciate hearing from you. CHEERS Bob