Estimates of the cost of invasive species to the United States alone are in the tens of billions of dollars yearly. Annual federal expenditures on prevention and management of invasive species are estimated to exceed $1.3 billion.
Depending on what specific conditions are. Some of the color we see when we close our eyes is light that gets thru the eye lid. It usually has a red componenet to it because of the blood veins. Sone, especially right after closing our eyes is the various elements in our visual system settling down (rods, cones, ...).
However, if it occurs frequently, you should have your eyes examined just in case it is a sign of something serious. Seeing stars is a common visual complaint, but it is usually a normal and harmless occurrence. If you close your eyes and rub them, you will probably see spots and flashes of light. These images you see are called phosphenes, an entoptic phenomenon characterized by the experience of seeing light without having light actually enter the eye. Phosphenes are produced by pressure on the eye.