When Poppy Biagini was just four months old, her family got news no parent wants to hear — that she had a rare, rapidly growing tumor in her right eye called a retinoblastoma.

That was almost three years ago. But if you looked at Poppy today, you’d be hard pressed to tell that she’s anything other than your average 3-year-old who loves Curious George, swim class and playing dress-up.

“She knows that there’s something a little different with her eye than everyone else’s,” her father Dana says. “But she’s handling it well.” …