Baseline characteristics of patients in the COOL study
| Variables | Experimental group (n=63) | Control group (n=65) | Total (n=128) |
| Age (years) | |||
| Mean (SD) | 72.9 (9.5) | 72.5 (9.7) | 72.7 (9.6) |
| Range | 51–91 | 44–96 | 44–96 |
| Gender, n (%) | |||
| Male | 24 (38.1) | 23 (35.4) | 47 (36.7) |
| Female | 39 (61.9) | 42 (64.6) | 81 (63.3) |
| Study eye, n (%) | |||
| Right | 31 (49.2) | 38 (58.5) | 69 (53.9) |
| Left | 32 (50.8) | 27 (41.5) | 59 (46.1) |
COOL, Comfort Operative Ocular Light.