Demographic data of patients with delayed tear clearance
| Delayed tear clearance without apparent obstruction | Delayed tear clearance with punctal obstruction | Asymptomatic normal | |
|---|---|---|---|
| Number of patients | 70 | 10 | 20 |
| Number of eyes | 127 | 19 | 40 |
| Age (mean (SD)) | 71.4 (11.2) | 67.9 (13.1) | 62.8 (17.8) |
| Sex | |||
| Male | 24 (34%) | 1 (10%) | 6 (30%) |
| Female | 46 (66%) | 9 (90%) | 14 (70%) |
| Involvement | NA | ||
| Bilateral | 57 (81%) | 9 (90%) | |
| Unilateral | 13 (19%) | 1 (10%) |
The definition of each group is detailed in the text.
NA = not applicable.