Don't sit too close to the TV. Don't watch TV without a light on in the room. Don't use over-the-counter eyedrops. Are these statements true? Find out by taking the following quiz.

Which habits can harm your vision? Learn about them by taking this quiz.

A seizure is an uncontrolled electrical discharge from brain cells that causes mental or physical symptoms. Epilepsy is a group of chronic conditions in which a person has unprovoked recurring seizures. Find out more about epilepsy and seizures by taking this quiz.

Find out more about constipation by taking this quiz.

A concussion is caused by a blow or jolt to the head. It is also called a traumatic brain injury. Find out more about concussions by taking this quiz.

Many people swear by alternative and complementary therapies. Find out more about these treatments by taking this quiz.

How much fiber should you consume? Is there more than one kind of fiber? What foods contain fiber? Test your knowledge about fiber by taking the Fiber Quiz.

Overactive bladder is a health problem that can affect your daily life. It can cause you to feel depressed, guilty, and tired from not sleeping well. You may have to miss work and may struggle with personal relationships.

Do you know tobacco smoke's effect on asthma? What about asthma's effect on pregnancy? Find out the answers to these and other questions by taking this quiz.

Each year, more than a million Americans die of heart attacks and other forms of heart disease. Low-dose aspirin therapy is one weapon in the arsenal against heart disease that also includes healthy dieting, adequate exercise, and not smoking. Learn more about aspirin's role in combating heart disease by taking this quiz