noun, noun which may take the genitive case particle 'no'
phototherapy; light therapy
Medical treatment using light, such as for skin conditions or seasonal affective disorder. Used as a noun or with の to modify another noun.
This hospital performs phototherapy for the treatment of psoriasis.
The effectiveness of light therapy varies from person to person.
A more general term for light-based treatment, while 光線療法 specifically refers to therapeutic use of light rays, often in a clinical context.
Compound of 光線 (light ray) and 療法 (therapy).