An eye is a complex structure and essentially all parts of the eye are required for vision to occur. However the part of the eye which detects the focused (by the lens) light image is the retina.
pupil,lens,retina, optic nerve
The Seeing Eye was created in 1929.
Seeing Eye Dog was created in 2009.
The Seeing Eye - film - was created in 1951.
Assuming you mean the part of the eye responsible for seeing color... There are two types of photoreceptors in the retina: rods and cones. The cones are responsible for seeing color. (The easy way to remember it is cones and color start with c.)
Neither. The all seeing eye is a 6th sense or intuition
An all-seeing eye is another term for the Eye of Providence, an eye usually enclosed in the eye of a triangle, used to represent the eye of God.
The All-Seeing Eye was created on 2001-06-15.
The All Seeing Eye was created on 1965-10-15.
"Seeing Eye" is a trademark for The Seeing Eye, a guide dog training school in the U.S. It was founded in 1929. Only dogs trained by the Seeing Eye can properly be called "Seeing Eye dogs." Guide dogs in general have been trained since at least as early as the middle ages.
As what, a dependent? Come on - I would say if it was a medically necessary item, like a seeing eye dog, etc. then maybe, but otherwise no.
For information about adopting retired Seeing Eye dogs (or puppies), go to this page on The Seeing Eye's website: http://www.seeingeye.org/aboutUs/?M_ID=129