valohoito

Valohoito, or light therapy, is a medical treatment that uses bright visible light to influence biological processes tied to daylight exposure. In Finnish contexts, Valohoito refers to this therapy as a method to adjust circadian rhythms and mood. It is most commonly used for seasonal affective disorder (SAD), but it also supports treatment of circadian rhythm sleep-wake disorders, jet lag, and some cases of non-seasonal depression, as well as certain sleep disturbances related to shift work.

The therapy typically employs a light box that emits 2,500 to 10,000 lux of light, filtered to remove ultraviolet radiation. Sessions usually last 20 to 60 minutes and are most effective when performed in the morning for several weeks. The distance between the eyes and the device is commonly about 30 to 60 centimeters, with users keeping their eyes open but not staring directly into the light. The exact protocol can vary by device, condition, and clinician guidance.

Evidence supports Valohoito as an effective option for SAD, with smaller or more variable support for non-seasonal depression and some sleep disorders. It is generally considered a safe treatment, though side effects can include eye strain, headaches, and insomnia if used too late in the day. People with bipolar disorder, retinal conditions, or photosensitivity from medications should seek medical advice before starting therapy. Devices should be used according to manufacturer instructions and clinical recommendations, and it is often considered as an adjunct to other treatments rather than a standalone substitute in moderate-to-severe cases.