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.
Cats, like humans, have both rods and cones in the retina. Rods are the receptors that the eye uses for night time viewing and sudden movement. Cones are used during the daytime, and process color information. Cats have more rods than cones, as compared with humans, making cat night vision superior to humans.
What color is hard to see with its actual color? How you see color? How we see colour  We see colour with sensors in retina of the eye called rods and cones. The rods are sensitive to low light and the cones which require a greater intensity â¦of light, are sensitive to colour. Each cone contains one of the 3 pigments sensitive to either RED BLUE or GREEN.