Reading increases ocular illuminance during light treatment
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Aamar Sleemi
Abstract
Background: Bright-light treatment is a safe and effective treatment for the management of winter seasonal affective disorder (SAD). In a recent study, we found that the relative duration of reading was positively associated with likelihood of remission after six weeks of light treatment.
Methods: Two technicians measured the illuminance of a light box with a light meter directed towards the center of reading material that was placed on a table in front of the light box. The measurement was also performed after reading material was removed. The two measurements were performed in a randomized order. Friedman analysis of variance with Wilcoxon post-hoc tests were used to compare illuminance with vs. without reading.
Results: The presence of the reading material increased illuminance by 470.93 lux (95% CI 300.10–641.75), p<0.0001.
Limitations: This is a technical report done under conditions intended to mimic those of typical ambulatory light treatment as much as possible.
Conclusions: As reading materials reflect light from the light box, reading during light therapy increases ocular illuminance. If confirmed by future studies using continuous recordings in randomized design, instructing SAD patients to read during light therapy may contribute to a more complete response to light treatment. The downside of specific relevance for students, is that reading, in particular, with bright light in the late evening/early night may induce or worsen circadian phase delay, adversely affecting health and functioning.
©2012 by Walter de Gruyter Berlin Boston
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Articles in the same Issue
- Masthead
- Masthead
- Editorial
- Community singing: what does that have to do with health?
- Review Articles
- Internet use, misuse, and addiction in adolescents: current issues and challenges
- Early executive function deficit in preterm children and its association with neurodevelopmental disorders in childhood: a literature review
- Original Articles
- Access to contraception and HIV testing among young women in a peri-urban district of Uganda
- Addressing the needs of adolescent mothers and their offspring in Nigeria: a community-based study
- Parental beliefs and knowledge about male human papillomavirus vaccination in the US: a survey of a pediatric clinic population
- Educating for the future: adolescent girls’ health and education in West Bengal, India
- Knowledge, attitude, and practice of cervical cancer screening among Greek students: a short report
- Environment factors associated with adolescents’ body mass index, physical activity and physical fitness in Kuching South City, Sarawak: a cross-sectional study
- Reading increases ocular illuminance during light treatment
- Sex-related perceptions associated with sexual activity status among Japanese adolescents who heavily use text messaging
- If I value myself, I value school: The protective effect of self-esteem among abused females
- The poverty puzzle: the surprising difference between wealthy and poor students for self-efficacy and academic achievement
- Exploring resilience: strengths of trafficking survivors in Cambodia
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