The image is a screenshot of a document titled "Abstract" from a scientific journal or publication. The abstract discusses the prevalence and impact of circadian rhythm disturbance in various psychiatric disorders, particularly those related to sleep disorders. It mentions that light exposure, particularly from artificial sources, can disrupt circadian rhythms, leading to symptoms such as insomnia, fatigue, and mood swings. The abstract also highlights the importance of light exposure as an environmental factor that can be associated with certain psychiatric conditions, including PTSD, substance use disorders, and mental health disorders. It further discusses the independent association between increased daytime light exposure and depression, anxiety, and self-harm. The abstract concludes by emphasizing the need for further research into the effects of light exposure on human health.