A single shot to keep blindness at bay?
London,October 15: Coming soon is a single shot that may keep blindness at bay. Yes, sight-saving drugs could one day be given without repeated injections into the eye, by temporarily breaching the blood-retina barrier, say scientists.
At present, drugs to treat age-related muscular degeneration, the leading cause of blindness, are injected in to the eyeball once a month. They cannot be injected into the blood partly because an eye lining normally prevents molecules in the blood from reaching the retina.