1. Medical treatment using light, especially ultraviolet or visible light, to treat skin conditions or other disorders.
Usage: Medical/clinical term; Commonly used in dermatology and psychiatry
2. Treatment of seasonal affective disorder (SAD) or depression using exposure to bright light.
Usage: Psychiatric/psychological application

Examples

• The dermatologist recommended phototherapy to treat the patient's psoriasis.
• Phototherapy with ultraviolet B light is an effective treatment for vitiligo.
• During winter months, some people use phototherapy to manage seasonal affective disorder.
• The patient underwent phototherapy sessions three times a week for eight weeks.
• Phototherapy has become a standard treatment option for certain types of eczema.
• Light therapy lamps used in phototherapy can help regulate circadian rhythms.