Sightsavers won the award for its work supporting children with disabilities in Malawi.
The legislation, approved on 10 January, will make it illegal to discriminate or exclude people on the basis of disability.
The Nigerian ministry of health presented the award for Sightsavers' work to treat the disease in Kaduna State.
The charity evaluator praised Sightsavers’ deworming work in Africa for its cost-effectiveness and transparency.
Charity evaluator ImpactMatters awarded Sightsavers a five-star rating for cost-effectiveness – the highest score available.
Medicine: The Wellcome Galleries is the world’s largest medical gallery and will be on display for at least 30 years.