Table.
Prolonged Local Anesthesia of the Cornea and Control (Normal)
| Group | Duration of Complete Block Mean ± SD (Hours) | Time to Return of Normal Sensation Mean ± SD (Hours) | Keratopathy Present Number of Corneas |
|---|---|---|---|
| Retrobulbar PLA: PGS-TTX with lubrication* | 50.1 ± 3.6 | 55.1 ± 3.6 | 0/12 |
| Retrobulbar PLA: PGS-TTX without lubrication* | 46 ± 2† | 48† | 1/4 |
| PLA: Topical amitriptyline without lubrication* | 24† | 24† | 12/12 |
| PLA: Topical amitriptyline with lubrication* | 24† | 24† | 4/4 |
| Untreated/normal cornea | 0 | 0 | 0/12 |
*
Lubricating eye drops.
†
Block duration was truncated by euthanasia.