| Primary Ophthalmic Etiologies | Systemic Disease Etiologies |
|---|
| Trauma (blunt or perforating) | Hypertension |
| Extraocular vascular compression (choking, chest compression) | Hyperviscosity syndrome |
| Preiridal fibrovascular membrane | Thrombocytopenia |
| Retinal detachment | Clotting disorder |
| Primary intraocular neoplasia (iris melanoma, ciliary body adenoma/adenocarcinoma) | Metastatic neoplasia (especially lymphoma) |
| Golden retriever pigmentary uveitis | Rickettsial disease |
| Patent anomalous congenital blood vessels (persistent pupillary membranes, tunica vasculosa lentis, hyaloid artery) | FIP |
| Fungal disease |
| Prototheca |
| Parasitic (aberrant intraocular larval migration) |