Inclusion Criteria: * Male or female * 3 years of age or older * Has XLRP confirmed by a retinal specialist and has a predicted disease-causing sequence variant in RPGR confirmed by an accredited laboratory Exclusion Criteria: * Has had ocular surgery within 3 months prior to screening or is anticipated to require ocular surgery within 6 months after the study intervention administration * Any investigational ocular treatment or any other ocular treatment that could confound the interpretation of the efficacy results or affect participant compliance with the visit schedule * Has undergone prior retinal surgery involving the macula, macular laser photocoagulation, external-beam radiation therapy, transpupillary thermotherapy, glaucoma filtration surgery or corneal surgery