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Light therapy, also called phototherapy or bright light therapy is the exposure to direct sunlight or artificial light at controlled wavelengths in order to treat a variety of medical disorders, including seasonal affective disorder (SAD), circadian rhythm sleep-wake disorders, cancers, and skin wound infections.
The 24-hour light-dark cycle is the most important external stimulus for regulating the timing of the circadian cycle. In addition to the aging eye, lighting designers need to consider the unique lifestyle needs of the elderly. It is especially important to provide strong illumination in stairwells to prevent slip and trips, for example.
This flickering can cause problems for some individuals with light sensitivity [1] and are associated with headaches and eyestrain. Such lamps are listed as problematic for some individuals with autism, epilepsy, [2] lupus, [3] chronic fatigue syndrome, Lyme disease, [4] and vertigo. [5] Newer fluorescent lights without magnetic ballasts have ...
Lyndon B. Johnson signing the Medicare amendment (July 30, 1965). Former President Harry S. Truman (seated) and his wife, Bess, are on the far right.. Originally, the name "Medicare" in the United States referred to a program providing medical care for families of people serving in the military as part of the Dependents' Medical Care Act, which was passed in 1956. [5]
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A lamp in an operating room. A surgical light – also referred to as an operating light or surgical lighthead – is a medical device intended to assist medical personnel during a surgical procedure by illuminating a local area or cavity of the patient. A combination of several surgical lights is often referred to as a “surgical light system”.
In the United States, health insurance helps pay for medical expenses through privately purchased insurance, social insurance, or a social welfare program funded by the government. [1][2] Synonyms for this usage include "health coverage", "health care coverage", and "health benefits". In a more technical sense, the term "health insurance" is ...
Exposure of skin to ultraviolet radiation from sunlight presents both positive and negative health effects. On the positive side, UV exposure enables the synthesis of vitamin D3, which is essential for bone health [1] and potentially plays a role in inhibiting certain cancers. [2][3] While vitamin D can also be obtained through dietary ...