IOP changes before, during necktie tightening, and after loosening the necktie
| Decreased | Increased | No change | |
|---|---|---|---|
| Normal (n=20) | |||
| Before tightening to during tightening (mean IOP change, mm Hg) | 4 (20%) (1.6) | 14 (70%) (4.1) | 2 (10%) |
| During tightening to after loosening (mean IOP change, mm Hg) | 18 (90%) (3.7) | 1 (5%) (0.5) | 1 (5%) |
| Before tightening to after loosening (mean IOP change, mm Hg) | 11 (55%) (2.3) | 7 (35%) (1.6) | 2 (10) |
| Glaucoma (n=20) | |||
| Before tightening to during tightening (mean IOP change, mm Hg) | 6 (30%) (0.9) | 12 (60%) (2.1) | 2 (10%) |
| During tightening to after loosening (mean IOP change, mm Hg) | 12 (60%) (2.3) | 4 (20%) (0.8) | 4 (20%) |
| Before tightening to after loosening (mean IOP change, mm Hg) | 10 (50%) (1.3) | 7 (35) (1.1) | 3 (15%) |