Photodynamic therapy (PDT) is a medical treatment that utilizes light-activated compounds to treat various conditions, including certain types of cancer, skin disorders, and age-related macular degeneration. The therapy involves three key components: 1. **Photosensitizer**: This is a special drug that is administered to the patient and accumulates in the target tissue. Photosensitizers are typically non-toxic before they are activated by light.
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