A cataract is a clouding of the lens of the eye that keeps light rays from passing through the lens and focusing on the retina. It then gets in the way of your eyesight.
Glaucoma is a health problem where the normal fluid pressure inside the eyes slowly builds up and doesn’t drain properly; the fluid collects and causes damage to the optic nerve.
Learn what do do if you have an injury to the head, scalp, skull or brain.
Stroke - where a blood vessel in the brain is blocked or bursts - is a serious condition that requires clinical care by a physician or other health care professional; brain damage can occur within minutes of having a stroke.