There are a few efforts to use CRISPR to treat or even cure blindness in humans. Researchers have successfully removed a genetic mutation from mice that causes retinitis pigmentosa, a disease that ultimately leads to blindness. After a single injection of the CRISPR/Cas9 system, the rats were able to see better than a control group. Plans to use a similar technique on humans are already underway. Biotechnology company Editas Medicine is planning to use CRISPR to treat the inherited eye disease leber's congenitial amaurosis (LCA) by 2017.