Treatment for blindness. Point of time.

My sister born with 1kg weight and survived by my parents. She is taking medication for epilepsy. At age 3, we found that she has problems with her vision and it was said to us that the problem is with the nerves that connects her eye with the brain. Most of the times, she can able find the objects movement in the day time. Sometime she can able to find the colors, if she look at the objects closely. We were consulting with doctors few years before and they said that there's no treatment for this till that point of time. Apart from this, she is also taking medicine for Schizophrenia for the past 3 years. Physically she is healthy and can do all of her work. I am seeking your advice, whether any new recent treatments are available for this at this point of time.