Retina transplantation in treatment of premature retinopathy grade 4 & 5?

My daughter 7 years old had premeture retinopathy since birth(1999) . She was born prematur (weight <1 Kgm) and preterm (< 28th gestational week) with CP and epilepsy. She was operated in Germany in 1999 for the retinal detachment as a preparation for retinal transplantation. Physically ,she is growing well ,but blind and , aggressive due to blindness.