Research Article
Wide Variation of Squeezing Force and Dispensing Time Interval among Eyedropper Bottles
| | | Mean | SD | Lower 95% CI | Upper 95% CI | Max. | Min. | Max./min. |
| | Squeezing force of the first drop (N) | 8.3 | 3.0 | 7.7 | 9.0 | 15.7 | 4.2 | 3.7 | | Squeezing force of the second drop (N) | 10.4 | 3.2 | 9.7 | 11.1 | 18.1 | 5.6 | 3.3 | | Interval (sec) | 3.1 | 1.2 | 2.8 | 3.4 | 7.3 | 1.0 | 7.3 | | Difference in two squeezing forces (N) | 2.1 | 0.8 | 1.9 | 2.2 | 4.8 | 0.2 | 20.7 |
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CI: confidential interval.
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