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Coats disease staging classification [38]
| Stage | Description |
|---|---|
| 1 | Retinal telangiectasia only |
| 2 | Telangiectasia and exudates |
| 2a | Extrafoveal exudation |
| 2b | Foveal exudation |
| 3 | Exudative retinal detachment |
| 3a | Subtotal retinal detachment (1) extrafoveal (2) foveal |
| 3b | Total retinal detachment |
| 4 | Total retinal detachment and glaucoma |
| 5 | Advanced end-stage disease |
