Comparison of nanosecond laser and picosecond laser iridotomyectomy
| Iridotomy/iridectomy | Nd:YAG ns laser | Nd:YLF ps laser | |||
|---|---|---|---|---|---|
| All iridectomies | 500 μm | 600 μm | 750 μm | ||
| Number of cases | 20 | 53 | 9 | 18 | 19 |
| Single pulse energy (mJ) | 7.9 (6.6–12.0) | 0.25 | 0.25 | 0.25 | 0.25 |
| Total number of pulses | 6.4 (3–14) | 14 851 (1259–60 400) | 6668 (1259–19 549) | 17 272 (2175–38 729) | 16 106 (1870–38 729) |
| Total energy (mJ) | 52 (20–122) | 4028 (316–15 400) | 1667 (316–4887) | 5166 (544–10 975) | 4087 (468–9682) |
| Complications: | |||||
| iris bleeding | 10 (50%) | 32 (64%) | 4 (44%) | 14 (75%) | 14 (74%) |
| increase in IOP >10 mm Hg | 1 (5%) | 11 (22%) | 0 (0%) | 1 (6%) | 8 (42%) |
| increase in IOP >20 mm Hg | 0 (0%) | 6 (11%) | 0 (0%) | 0 (0%) | 4 (21%) |
| mean mm Hg increase in IOP | 6 (0–21) | 9 (0–29) | 3 (0–6) | 5 (1–14) | 16 (1–29) |
| exudation of fibrin | 2 (10%) | 1 (2%) | 0 (0%) | 0 (0%) | 1 (5%) |
| corneal lesion | 1 (5%) | 7 (13%) | 0 (0%) | 4 (22%) | 3 (14%) |
| repeat treatment necessary | 5 (25%) | 6 (11%) | 1 (11%) | 2 (11%) | 3 (14%) |