Safety and Tolerability of KH631 Gene Therapy in Participants With Neovascular Age-related Macular Degeneration

Inclusion Criteria: 1\. Males and Females ages 50 to 85 (inclusive) with a study eye which meets the following criteria: a. Previously received IVT treatment of anti-VEGF for neovascular AMD, with documented response to anti-VEGF therapy during the first 2 weeks of screening b. active macular CNV lesion secondary to AMD evidenced by SD-OCT c. Have a ETDRS BCVA letter score of 63 to 19 (approximately 20/63 to 20/400 Snellen equivalent) in the study eye at Screening for the first subject in each cohort (sentinel subject), followed by ETDRS BCVA letter score of 73 to 19 (approximately 20/40 to 20/400 Snellen equivalent) for the rest of the subjects each cohort; d. Pseudophakia in the study eye, with ocular media to permit high quality fundus imaging at screening and allow planned vitrectomy and subretinal injection; e. Are willing and able to sign the study written informed consent form (ICF). Exclusion Criteria: 1. Have had any prior ocular or systemic treatment (investigational or approved) or surgery for the treatment of neovascular AMD except IVT anti-VEGF 2. Retinal pigment epithelial tears or rips at screening 3. Any history or presence of vitreous hemorrhage; 4. Have any condition preventing visual acuity improvement; 5. Have any other cause of CNV; prior pars plana vitrectomy or scleral buckling or retinal detachment surgery; macular hole, Epiretinal membrane or vitreo-macular traction; full thickness macular hole; 6. History of intraocular or periocular surgery in the prior 3 months; 7. Prior trabeculectomy or other filtration surgery ; 8. Any use of long-acting intraocular steroids, including implants, within six months prior;