Learn about CRE infection, including symptoms, diagnosis, treatment, and prevention.

A corneal ulcer is an open sore on your cornea. In most cases, it's caused by an infection.

Corneal transplantation is a surgery to replace a cornea that has problems.

Corneal ring implantation is a type of eye surgery. It puts a small ring of plastic into the cornea. It is done to fix an eyesight problem, so you can see more clearly.

Convergence insufficiency (CI) is a problem with the way the eye moves. It makes it hard to focus on things nearby. When the eyes converge, it means they point inward (toward the midline) to focus on something close. With CI, the eyes have trouble doing this. One eye may turn out instead of looking inward. CI can cause blurred vision, double vision, and eyestrain.

Left bundle branch block is a problem in the heart's electrical system. It causes the left lower chamber (ventricle) of the heart to pump more slowly than normal.

Eosinophilic esophagitis (EoE) is an allergic reaction. It occurs in the esophagus. Learn about the causes, symptoms, diagnosis, treatment, how to live with this condition, and when to call for help.

CPVT is a rare genetic condition that causes a serious irregular heartbeat.

Aortic valve regurgitation is when the aortic valve leaks. The aortic valve is one of the heart's four valves. It is on the left side of the heart. It sits between the lower chamber (ventricle) and the large blood vessel that sends blood to the body (aorta).

Ear barotrauma is a type of ear damage. Learn more about this condition, including causes, symptoms, diagnosis, and treatment.