Rhiannon Kay is missing the part of the eye that makes our eyes blue, brown, grey or green. Instead they're completely black and are super sensitive to light. Her parents have to keep the blinds drawn at their home in Alpington near Norwich as Natalie Gray now reports.
The two year old has a rare genetic condition called Aniridia which affects one in every 75,000 babies worldwide.
Her parents make sure the blinds are drawn during the day to dim the light in their home.
But they've had to endure cruel comments from strangers who see Rhiannon in sunglasses and do not understand.
At the moment there is no cure. But her parents live in hope. In the meantime they're just thankful that their little girl is so very happy.