The PoC stage will begin immediately following the recommendation of the DSMB and the Dose Escalation Committee (DEC) on the selected dose. Participants will be randomized in a 1:1:1 ratio to either the low cells/dose; the selected cells/ dose or an untreated control group. Doses will be administered to the study eye via a subretinal injection for the low cells/ dose and the selected cells/ dose.