Vision researcher Vision researcher Audrey Bernstein, PhD, Audrey Bernstein, PhD, discusses the effort to determine what causes glaucoma. Physiatrist discusses the effort to determine what causes glaucoma. Physiatrist Gizelda Casella, MD Gizelda Casella, MD, PhD, tells about spinal cord injury and rehabilitation. Nurses Joey Michelle Angelina and Lorrie Langdon explain one way to help heart-failure patients stay healthy., PhD, tells about spinal cord injury and rehabilitation. Nurses Joey Michelle Angelina and Lorrie Langdon explain one way to help heart-failure patients stay healthy.