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| Patients | Grade at first ophthalmology review | Grade at latest ophthalmology review | Interval |
|---|---|---|---|
| A | |||
| Vertical | IIB | IID | 8 years |
| Horizontal | IIIB | IIIC | |
| B | |||
| Vertical | IIA | IIB | 2 years |
| Horizontal | IIIA | IIIA | |
| C | |||
| Vertical | IIA | IIC | 6 years |
| Horizontal | IIIA | IIIC | |
| D | |||
| Vertical | IIB | IIB | 3 years |
| Horizontal | IIIA | IIIC | |
| E | |||
| Vertical | IIC | IID | 13 years |
| Horizontal | IIIC | IIIC |
