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The nerve/eye index in healthy adults
| ONSD/ETD index | Right eye | Left eye |
|---|---|---|
| Average |
0.19 ± 0.01 |
0.19 ± 0.02 |
| Max |
0.26 |
0.26 |
| Min | 0.15 | 0.15 |
The index is calculated as ONSD taken from the middle part of the intraorbital path of the optic nerve divided by the transverse diameter of the eyeball (ONSD/ETD).
