Light therapy for preventing seasonal active disorder (Review)

06 Apr Light therapy for preventing seasonal active disorder (Review)

Seasonal a+ective disorder (SAD) is a seasonal pattern of recurrent major depressive episodes that most commonly occurs during autumn or winter and remits in spring. The prevalence of SAD ranges from 1.5% to 9%, depending on latitude. The predictable seasonal aspect of SAD provides a promising opportunity for prevention. This review – one of four reviews on e+icacy and safety of interventions to prevent SAD – focuses on light therapy as a preventive intervention.