| Stage | Description | Ocular feature | Treatment | |||
| PRP | Anti VEGF | Anti-glaucoma medicine | Glaucoma Filtration Surgery | |||
| I | Pre-glaucoma/ Rubeosis iridis | NVI++− At pupillary margin than runs irregularly and cross SS to TM IOP normal | Yes | Yes | No | NO |
| II | Angle open | Development of fibrovascular membrane on iris and angle NVI+++ NVA± IOP Elevated | Yes | Yes | Yes | + |
| III | Angle closed | Contracture of fibrovascular membrane on iris, pulls the iris over T M and form PAS NVI+++ with ectropion uveae NVA+++± but not visible due to synechia IOP Elevated | Yes | Yes | Yes | Yes |