Hit To The Head. Mild traumatic brain injury (MTBI) is another term for concussion.

25. A cup of raw vegetables contains 5 grams of carbohydrates and 2 grams of protein.

Farsightedness. The cause of hyperopia is usually genetic.

Around The Eye. The nasolacrimal ducts are commonly known as the tear ducts.

60 Minutes. According to the World Health Organization, more than 80% of the world's adolescent population is insufficiently physically active.

Capillaries. The human body has about 25,000 miles of capillaries.