This groundbreaking study from Harvard Medical School demonstrates the remarkable effectiveness of CRISPR-based genetic treatments. It reports the successful elimination of an inherited form of blindness in an adult patient, caused by the mutation of a gene in a single cell, proving the potential of CRISPR gene therapy to treat a wide variety of inherited genetic diseases. This study shows the incredible promise of CRISPR for targeting and treating the genetic cause of diseases in a way never seen before.