Exposure to light can cause our biological clock to advance or delay, which affects our sleep and wake cycle. We need strong regular light signals to have our circadian rhythms on track. Indeed, light is the most essential factor which controls our internal body clock. Sunrise and sunset used to do the job, but owing to the vicissitudes brought by modern life, these rhythms are disrupted which can lead to health problems, including sleeping disorders, and can affect our mood and general well-being.
Dr Norman Rosenthal is a South African author, psychiatrist and scientist who in the 1980s first described winter depression or seasonal affective disorder (SAD), and pioneered the use of light therapy for its treatment.
On 22nd September 2017, I attended the seminar, Beat Winter Depression With Dr Norman Rosenthal held in London, and I had the opportunity to interview Dr Rosenthal to talk about SAD and light therapy.
The event was sponsored by Cambridge-based light therapy specialist Lumie. Since 1991 Lumie has been researching and designing bright lights to treat seasonal affective disorder (SAD) and other conditions.
Dennis Relojo is the Founder of Psychreg, and is the Editor-in-Chief of Psychreg Journal of Psychology. In addition to his duties with Psychreg, he also serves as editorial board member for a number of peer-reviewed journals. Dennis holds a master’s degree in Psychology from the University of Hertfordshire and his research interest lies in the broad area of applied psychology. You can connect with him through Twitter @DennisRelojo and his website.