Choroidal neovascularization secondary to age-related macular degeneration also involves the abnormal rapid growth of vascular tissues. The photosensitizing drug administered will bind specifically to the abnormal vessel.

• 由于老年黄斑退化会引致脉络膜新增不正常的血管,而光动力疗法所用的感光药物正好协助把不正常的血管堵塞。