Figure 1
Corneal vascularisation staging determined using indocyanine green angiography19. Stage 1: Active young vessels that are newly formed and progressing with a well-defined fine capillary network; signs of leakage and oedema are seen in the surrounding corneal stroma. Stage 2: Active old vessels which appear less bright and reach the lesion but not progressing. Stage 3: Partially regressed vessels with slow blood circulation and are of reduced visibility. Stage 4: Mature vessels that are relatively large with minimal arborisation and regressed or absent capillary networks. Stage 5: Regressed vessels that are very fine white lines mirroring the morphology of the original vessels (ghost vessels).
