Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  shimmer, play(verb) a weak and tremulous light. 2  shimmer(verb) shine with a weak or fitful light. 3  shimmer(verb) give off a shimmering reflection, as of silk.
CONE CELLS are the second type of light sensitive cells in the retina of the eye. The human retina contains 6-7 million cones; they function best in bright light and are essential for acute vision (receiving a sharp accurate image).
Cones are most helpful in normal or bright light. The retina has three types of cones. Each cone type is sensitive to one of three different colors â red, green, or blue â to help you see different ranges of color. Together, these cones can sense combinations of light waves that enable our eyes to see millions of colors. cones sense colour in the eye.