Photodynamic therapy for Age related Macular Degeneration and Central serous retinopathy A photosensitive dye is administered intravenously and flows into the leaky vascular structures under the retina. Then the ophthalmologist treats eye with a red laser of a specific wavelength (689nm) for about 90 seconds. The non-thermal laser light activates the dye producing an active form of oxygen that both coagulates and reduces the growth of abnormal blood vessels.
