Grades | Criteria | Score |
---|---|---|
Normal (grade 0) | Normal: < 4 dots within box | 0 |
Mild to moderate (grade 1) | ≥ 4 dots within box and < 50% of ROI filled with color pixels representing hyperemia | 1 |
Severe (grade 2) | ≥ 50% of ROI filled with color pixels representing hyperemia | 2 |