Photodynamic therapy is performed by injecting a special dye known as Verteporfin. Intravenous verteporfin, selectively localizes in new blood vessels and is activated by laser light on the target area. Non thermal laser energy (diode laser, operating at a wavelength of 689 nm) is then applied locally to the CNVM to produce photochemical reactions that lead to closure of new vessel (thrombosis).
More than one treatment sessions may be required to achieve complete closure.
These are the latest drugs which have given a ray of hope to improve vision in patient with wet ARMD.These are drugs which prevent the formation of new blood vessels and reduce leakage. More than one injection may be necessary.