Helen Keller International 通过建立基于视力、健康和营养方面的证据和研究的计划来对抗失明和营养不良的原因和后果。
So I found out they do provide trade-free goods: “Since 1994, Helen Keller International has provided free vision screenings for more than 2 million children in the United States and provided more than 300,000 of them with prescription eyeglasses to solve common vision problems.” – but they also provide access to some trade-based services: “We are improving access to high-quality, affordable cataract surgeries for poor and remote communities in under-served regions of Asia.” (https://www.hki.org/what-we-do/saving-sight/)
Of course it’s great that they provide affordable cataract surgeries for poor people, but that’s not trade-free. So I can’t give them 5/5 blocks, even though they seem to be a great organization with good intentions.