How Cones
Work
In regards
to color vision, The Young-Helmholtz trichromatic model advocates the existence
of, within the eye, three cone types with differing photosensitive pigments
that determine what part of the visible spectrum of light; long, medium, or
short waves, are being perceived. Night
vision utilizes rods, and color is irrelevant to rods. However, this theory leaves many unanswered
questions and paradoxical phenomenon.5
The most
obvious unanswered question is why are the cones shaped like cones? The Cone Spectrometer Model suggests that the
tapered shape is fundamental to the workings of cones. Light, focused on the retina by the eye’s
optics, enters the photosensitive receptors, which are small, only marginally
bigger than the wavelength of light.6
White light
enters the wide opening, and then travels down the tapered shaft. As the path narrows, only shorter waves can
continue down the path, getting shorter and shorter as the path tapers. The longest waves are shunted out first, i.e.
for human perception, the Reds in positive light, then the Greens, finally the Blues. This allows the cone to
determine what length/color the wavelength is, based upon penetration depth.7
The
following picture illustrates Spectral Dispersion in the Order Hemisphere.
About Gori Suture
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