Inclusion Criteria: 1. Subjects who are able to understand and sign the ICF 2. Female or male aged 8-45 years old when signing the ICF 3. Clinically diagnosed with biallelic RPE65 mutation-associated retinal dystrophy Exclusion Criteria: 1. Other interfering eye diseases 2. Presence of any systemic or ocular disease that can cause or likely to cause vision loss 3. There is evidence of obviously uncontrolled concomitant diseases 4. Known to have active or suspected autoimmune diseases 5. With active systemic infection under treatment 6. Pregnant or lactating women 7. Other conditions unsuitable for the study as determined by the investigator