The July art exhibition at the Medford Public Library, “New Experiences, Clarity of Vision,” will feature works from participants in the Lakota YouthStay cultural exchange program. Since 2017, Oglala Lakota youth from the Pine Ridge reservation in South Dakota have visited Eastern Massachusetts each summer as part of the Lakota YouthStay, founded by Medford resident Joy Harris. In this exhibit, the youth and others tell the story of their experiences through the camera lens, creating a visual picture of what…