Design: This is a Phase I/IIa, prospective, dose escalation, single-center study. One eye of each participant will receive the AAV-RS1 gene vector application by intravitreal injection. Participants will be closely monitored in conjunction with DSMC oversight. Participants will be followed for 18 months after which they will continue to be followed for up to 15 years after enrollment, or per FDA requirements, for further safety analysis.