Yes
True
Yes, changes in skin color can be indicative of various health conditions such as anemia, liver disease, or circulation problems. Skin discoloration can provide important clues to underlying health issues and help a physician diagnose and treat homeostatic imbalances.
The rods in the retina of the eyes are sensitive to low levels of light and movement. The cones are the ones that are sensitive to color and intensity, so the rods do not see color.
Because your eyes have cones that detect color. Rods detect black and white.
Black
cones for color,rod are for black and white
The cones, located in the retina, detect color.
Apparently color blind people were sent in first, since they are naturally able to detect the contrast of camouflaged enemies in the jungle areas as opposed to normal people who would detect the color as blended in.
Rods are for seeing light and dark, cones are for seeing color.
Sensors are used to detect things, such as motion, light, or color.
Green - except that your eye doesn't detect "color", just relative frequency. Your brain encodes that into color.
there are pens that can detect color change if there real