The process destroys the abnomal vessels that cause macular degeneration. It does not damage the retina, explained U.T. Southwestern opthalmologist Albert Edwards. Doctors say so far, the treatment has worked best on older adults with macular degeneration. Patricia d'Happert is hoping it will help her see well enough to actually watch TV and resume the sewing projects she had to give up. It takes anywhere from a few days to a few months for patients to see results from photodynamic therapy.
Some patients have to return for a second treatment.
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