Every colour has a wavelength and vibrationary
rate that is unique to it. When light rays enter the eye through
the pupil, they travel to the retina. The retina consists of a
layer of cells situated at the back of the eye. The cells in the
retina contain light-sensitive pigments; each cell is sensitive
to one of the three primary colours. When light reaches the retina,
the pigment in these colour sensory cells is broken down. This
has the effect of triggering a nervous impulse that travels through
the optic nerve to the visual cortex in the brain. Nervous impulses
travel, via the hypothalamus, to the pituitary and pineal glands.
These glands are sensitive to the effect of light, and control
many of our body functions, and our energy system.