| Good |
The complete structure of retina can be clearly observed in the image, and signal is useful for retinopathy diagnosis. |
| Off-center |
The retinal signal is placed too high or too low on the image where the signal cannot be fully displayed. |
| Signal-shield |
Total or partial loss of retinal signal. |
| Other |
Poor quality under other circumstances, such as images with good signal quality but without useful signal information, or images with serious artifacts. |
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Anomaly label
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| Normal |
The retina is healthy and without any deformation or defect. |
| Abnormal |
The retina is unhealthy because of deformation, edema, bleeding, hiatus, or other anomalies. |
