The diaphragm and the cervical cap are cup-shaped devices that are inserted into the vagina. They protect against pregnancy by covering the cervix and keeping sperm from meeting the egg.

A condom is a sheath that forms a barrier between the penis and the vagina. Condoms can be used alone or with other forms of birth control to provide protection against pregnancy.

CTA is an imaging test. You will get an X-ray dye before the test. The dye makes it easier to see your blood vessels on the X-ray.

Chemoembolization is a way to treat cancer in the liver. It can be used for cancer that starts in the liver. Or it can be used for cancer that has spread (metastasized) to the liver from other parts of the body. Learn more about the procedure.

High blood pressure is known as the silent killer" because it often has no symptoms. Left uncontrolled

PRK is surgery to help you see better without glasses or corrective lenses.

LASIK is laser surgery that helps reshape your cornea. It can help you see better without glasses or corrective lenses.

Refractive surgery can improve your eyesight, but it does have some risks.

Your vision depends on how light is focused in your eye. A look at 3 common problems with focusing that make vision blurry: farsightedness, nearsightedness, and astigmatism.

Take a closer look at how a new lens is implanted after cataract surgery.