Table 2. Frequency distribution of optic nerves grading.
| Control | OHT | OHT + Caffeine | ||||
|---|---|---|---|---|---|---|
| Animal 1 | Animal 2 | Animal 1 | Animal 2 | Animal 1 | Animal 2 | |
| Grade 1 | 10 | 8 | 0 | 0 | 5 | 0 |
| Grade 2 | – | 2 | 2 | 1 | 4 | 6 |
| Grade 3 | – | – | 4 | 8 | 0 | 3 |
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