| Laser parameters [I, D] | ALT | SLT |
| Spot size | 50 μm | 400 μm |
| Exposure | 0.1 sec | 3 nsec (fixed) |
| Power | 500-1200 mW according to the reaction on the TM; with heavily pigmented TM low power is sufficient | 0.4 to 1.2 mJ according to the desired reaction; in heavily pigmented TM start with low levels e.g. 0.4 mJ |
| Optimal reaction | Transient bleaching or small gas bubble formation | The power is titrated until the appearance of tiny air bubbles, »champagne bubbles«, at the site of the laser burn, then the power is reduced by increments of 0.1 mJ until there are no visible bubbles* |
| Number of spots | 50-100 evenly spaced | spots over 180-360° 50-100 non-overlapping spots spaced over 180 -360° |
some continue with the power that causes champagne bubble formation