Researchers are exploring a potential alternative to treat chronic pain that is safe, affordable, and comes with few or no side effects and no risk of addiction: green light exposure. They are not overly enthusiastic though as the science is still young and the research is by no means conclusive. In recent years, however, studies have found that exposing people to light across the green wavelength—either by having them sit in a dark room illuminated by green LED light strips or by giving them green-tinted glasses to wear—can reduce both their severity of pain and the frequency of episodes of migraines, fibromyalgia, and chronic musculoskeletal pain. It can also relieve the anxiety and fear associated with chronic pain.5Mark for ReviewABCWhich choice best states the function of the underlined sentence in the text as a whole?AIt explains how the work of the researchers helped people with chronic pain.BIt presents what the researchers feel currently about their research.CIt identifies the problem that the researchers attempted to solve but did not.DIt describes a serious limitation of the method used by the researchers.

e use of light-emitting electronic devices before bedtime may contribute to or exacerbate sleep problems. Exposure to blue-wavelength light in particular from these devices may affect sleep by suppressing melatonin and causing neurophysiologic arousal. We aimed to determine if wearing amber-tinted blue light-blocking lenses before bedtime improves sleep in individuals with insomnia. Fourteen individuals (n = 8 females; age ± SD 46.6 ± 11.5 y) with insomnia symptoms wore blue light-blocking amber lenses or clear placebo lenses in lightweight wraparound frames for 2 h immediately preceding bedtime for 7 consecutive nights in a randomized crossover trial (4-wk washout). Ambulatory sleep measures included the Pittsburgh Insomnia Rating Scale (PIRS) completed at the end of each intervention period, and daily post-sleep questionnaire and wrist-actigraphy. PIRS total scores, and Quality of Life, Distress, and Sleep Parameter subscales, were improved in amber vs. clear lenses condition (p-values <0.05). Reported wake-time was significantly delayed, and mean subjective total sleep time (TST), overall quality, and soundness of sleep were significantly higher (p-values <0.05) in amber vs. clear lenses condition over the 7-d intervention period. Actigraphic measures of TST only were significantly higher in amber vs. clear lenses condition (p = 0.035). Wearing amber vs. clear lenses for 2-h preceding bedtime for 1 week improved sleep in individuals with insomnia symptoms. These findings have health relevance given the broad use of light-emitting devices before bedtime and prevalence of insomnia. Amber lenses represent a safe, affordable, and easily implemented therapeutic intervention for insomnia symptoms.

Darkness is to Lamp asOptions :Fatigue : Exercise

Which of the following statements is true of light therapy?Multiple ChoiceIt passes an electric current through the part of the body that is affected by pain.It stimulates nerve cells in the brain to provide direct pain relief.It stimulates the production of healing enzymes.It encourages the development of different thought patterns and beliefs.

State one positive impact of light produced by technology, on society and the environment.

What type of visual impairment makes it difficult for people to distinguish red and green pigments due to an inability to see green wavelengths