Because Mikayla McDermott was only a toddler when she was diagnosed with juvenile arthritis, she can’t remember the early bad days. But she has been living with the disease, which causes joint pain, swelling, and can affect eyesight, ever since. “It started in my knee and kind of spread to different parts,” the 15-year-old said. “I was diagnosed when I was around two years old, so I don’t really remember the bad days of it. It’s been really good lately.” While older Australians know the condition well, awareness about juvenile arthritis — which causes pain and swelling in joints and can affect eyesight — is low.