Just 12 and 10 years old, siblings Caroline and Cole Cooper have both been diagnosed with a rare genetic retinal disease. While struggling with limited sight, both children were in danger of going completely blind. Their concerned parents learned there was no cure. But they refused that diagnosis and found a possible cutting edge medical breakthrough. A Philadelphia biotech company was researching gene therapy as an experimental treatment. Reporter Meg Tirrell meets the family placing hope on a new procedure that could be a treatment for limited vision.