0 |
Normal retina structure |
0.5/trace |
Mild inflammatory cell infiltration. No tissue damage |
1 |
Infiltration; retinal folds and focal retinal detachments; few small granulomas in choroid and retina, perivasculitis |
2 |
Moderate infiltration; retinal folds, detachments and focal photoreceptor cell damage; small to medium sized granulomas, perivasculitis and vasculitis |
3 |
Medium to heavy infiltration; extensive retinal folding with detachments, moderate photoreceptor cell damage; medium sized granulomatous lesions; subretinal neovascularization |
4 |
Heavy infiltration; diffuse retinal detachment with serous exudate and subretinal bleeding; extensive photoreceptor cell damage; large granulomatous lesions; subretinal neovascularization |