Tumour size and location before treatment and treatment parameters used during TCT. The mean total energy was calculated as sum of laser power and duration of treatment. Initial tumour volume was calculated as a cone shaped model based on tumour diameter and height before TCT
| Parameter | Mean | Range | STDV |
|---|---|---|---|
| Age (months) | 8.9 | 0.75–35 | 7.3 |
| Number of tumours per eye | 3.9 | 1–8 | 1.7 |
| Tumour diameter (mm) | 6.1 | 1–15.6 | 4.1 |
| Tumour height (mm) | 3.5 | 0.5–9.5 | 2.3 |
| Distance to optic disc (mm) | 2.5 | 0–8 | 2.5 |
| Number of TCT sessions | 4.3 | 1–6 | 1.6 |
| Mean duration of individual TCT session (minutes) | 13.5 | 2–25 | 5.6 |
| Total duration of TCT (minutes) | 51 | 10–125 | 31 |
| Mean power during TCT session (mW) | 539 | 150–1500 | 211 |
| Mean total energy used during TCT (J) | 1930 | 180–4830 | 1855 |
| Mean energy/tumour volume used during TCT (J/mm3) | 301 | 2.8–4280 | 691 |