Clark County High School students, Maryanna Muñoz, center, and Deserae Olsen listen as Scott Helkaa, left, program director for ophthalmic technology at College of Southern Nevada, demonstrates how an optical lens edger is used to make eyeglasses during CSN’s Health Career Exploration Camp at CSN Las Vegas campus on Wednesday, June 6, 2018. Bizuayehu Tesfaye/Las Vegas Review-Journal @bizutesfaye