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A free radical is an atom or molecule with at least one unpaired electron, making it especially reactive to other atoms or groups

Complementary medicine is a nonstandard therapy that some people use in addition to their doctor's standard care. (The word

Patellar tracking disorder is an imbalance in the knee area that causes the kneecap (patella) to shift or tilt out of place as the

Provides step-by-step instructions and photos for doing easy and then more intense exercises for patellar tracking disorder.

Accommodation is the ability of the lens of the eye to change shape, allowing for a change in focus from far to near. The lens

Photorefractive keratectomy (PRK) and laser epithelial keratomileusis (LASEK) for farsightedness use a laser to reshape the cornea

Laser in-situ keratomileusis (LASIK) is the preferred procedure for correcting farsightedness (hyperopia). It changes the shape of

There are two different types of peptic ulcers. They are: Gastric ulcers, which form in the lining of the stomach. Duodenal ulcers

A chalazion (plural: chalazia) is an inflammation of the deep oil glands inside the eyelid. It develops over 2 to 3 weeks, forming

Symptoms of GERD can be painful and, if allowed to continue, can lead to complications including esophagitis. Esophagitis is