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.
o Rods: Sensitive to light and can only see black and white o Cones: Sensitive to color and are responsible for color vision What is accommodation o The lens in the eye changes thickness based on how close or far something is away Definition of sensation and perception o Sensation: When the sense organs are activated (noticing the stimuli) o Perception: Interprets the sensation and turns it into something meaningful for the body Chapter 4 The different stages: e.g., REM, Stage 1-4 etc ...