Diseases, Conditions, Syndromes

Laughter may be as effective as drops for dry eye disease

Dry eye disease (DED) is a chronic condition estimated to affect around 360 million individuals worldwide. Common symptoms include uncomfortable, red, scratchy or irritated eyes.

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Chronic pain

Chronic pain is defined as pain that persists longer than the temporal course of natural healing, associated with a particular type of injury or disease process.

The International Association for the Study of Pain defines pain as "an unpleasant sensory and emotional experience associated with actual or potential tissue damage, or described in terms of such damage." Pain is subjective in nature and is defined by the person experiencing it, and the medical community's understanding of chronic pain now includes the impact that the mind has in processing and interpreting pain signals.

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