Keratoconus causes the middle of the cornea to thin, bulge outward, and form a rounded cone shape. This abnormal curvature of the cornea can cause double or blurred vision, nearsightedness, astigmatism, and increased sensitivity to light.
Bruises develop when small blood vessels under the skin tear or rupture, most often from a bump or fall. Blood leaks into tissues under the skin and causes the black-and-blue color. As bruises (contusions) heal, usually within 2 to 4 weeks, they often turn colors, including purplish black, reddish blue, or yellowish green. Sometimes the area of the bruise spreads down the body in the direction of gravity. A bruise on a leg usually will take longer to heal than a bruise on the face or arms.
Answers from Contributors (1) SUCCESS! A. It depends on the condition of the bruise. Usually It takes about 2 weeks for a bruise to heel. A bruise means broken blood vessels inside your skin. The color comes from red blood cells leaking out of the broken blood vessels. Bruises are caused by deep pressure like an object hitting the skin with a certain amount of pressure.