In-depth

Astigmatism

Many people have astigmatism, an irregular curvature of the eye's surface that can cause blurred vision. Treatments include corrective lenses and laser surgery.

Echocardiogram

Echocardiogram allows your doctor to see your heart in motion. Here's what you need to know about the test.

Electrocardiogram

An electrocardiogram (ECG or EKG) is a test that provides valuable clues about your heart health. Here's what you need to know about the test.

Eye exam

Eye exam — Overview covers definition, what to expect and results of vision testing.

Farsightedness

With farsightedness (hyperopia) you can see objects in the distance clearly, but objects nearby are blurry. It's easily corrected with eyeglasses or contact lenses.

Genetic testing

Genetic testing is used to detect altered genes that may cause illness or disease. Although genetic testing can offer important health information, it has limitations.

Hypertrophic cardiomyopathy

Hypertrophic cardiomyopathy is a genetic disorder in which heart muscle becomes abnormally thick. It's the most common cause of sudden cardiac death in young people.

Nearsightedness

Nearsightedness allows you to see objects near to you clearly, but objects farther away look blurry. It's easily corrected with eyeglasses or contact lenses.

Pulmonary valve stenosis

Swollen lymph nodes

Swollen lymph nodes usually indicate an infection, particularly in children. However, there are many causes, ranging from the common cold to cancer.

Ventricular septal defect

Aug. 03, 2013

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