At the University of Rochester researchers have found that
our perception of color is controlled much more by our brains than by our eyes.
The number of color-sensitive cones in the human retina differs from person to
person, but we all perceive colors in the same way. A laser-based system was
used to map out the topography of the inner eye. Imaging the living retina allowed
light to shine directly into the eye to see what wavelengths each cone reflects
and absorbs, and which color each is responsive. Each subject was asked to tune
the color of a disk of light to produce a pure yellow light that was neither
reddish yellow nor greenish yellow. Everyone selected nearly the same
wavelength of yellow, showing a consensus over what color they
perceived yellow to be. Once researchers looked into their eyes, they were
surprised to see that the number of long and middle wavelength cones (the cones
that detect red, green, and yellow) were sometimes scattered throughout the
retina, or weren’t present at all.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment