Digital BW, The Print

Anthony,

OK; I simplified things too much. For anyone wanting to read more on this, a
really good book is 'Vision and Art; the Biology of Seeing' by Margaret
Livingstone, a neurophysiologist.

Bob Frost.

----- Original Message ----- 
From: "Anthony G. Atkielski" <anthony@...>
>
> All of the precise vision is provided by the cones.  Rods are largely
> absence from the fovea, and they bloom readily in bright light.  People
> who have only rods, for example (achromatopsia--true black-and-white
> color blindness), are normally legally blind, because the vision
> provided by rods is almost unusable except for very gross perception.
>
> For fine detail and color, the cones are used.