Sjögren syndrome is an autoimmune health problem. It’s a disease where the body’s immune system attacks its own cells and tissues. With Sjögren syndrome, white blood cells fight the glands that make moisture in the body and primarily attack the tear glands and salivary glands. It most often affects women over age 40.

Ectropion is an eyelid that sags or turns outward. It often affects one or both lower eyelids. Ectropion leaves the eye too exposed. The eye can become dry, irritated, and even infected. This can lead to serious problems. In some cases it can lead to loss of eyesight.

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.

Your immune system’s job is to find and destroy things in the body that may cause harm. But in some cases, the immune response can be a problem. After a heart transplant, your immune system sees your new heart as a threat. It can start to attack the heart. This is called rejection.

Eosinophilic esophagitis (EoE) is an allergic reaction. It occurs in the esophagus.