Vision Aid Overseas and a chain of garden centres have combined to launch a spectacles-recycling scheme for countries in the developing world.
For four weeks during May and June, customers that donate old pairs of glasses at any Notcutts Garden Centre will receive a 10 per cent discount on plants.
Vision Aid runs a large spectacle-recycling scheme and has dispensed more than two million pairs of glasses to people in 19 countries since 1989.
Vision Aid's director Tym Marsh said: "As the charity plans its hundredth project to Ghana in May, we need resources of all kinds to continue our important work. We are making a real difference to the lives of many people but there is so much more to do."