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.
Asker's rating. Report Abuse. Small bruises usually go away in a couple of days but big ones can take up to a couple of weeks. It all depends on how hard the impact was on the area of your body, and if the bruise is on a large muscular area or on bone.Sunseeker Â· 9 years ago.mall bruises usually go away in a couple of days but big ones can take up to a couple of weeks. It all depends on how hard the impact was on the area of your body, and if the bruise is on a large muscular area or on bone. Sunseeker Â· 9 years ago.