| A Study of the Tono-pen for Assessing Ocular Pressure in Patients with Headache Combined with Ocular Pain in the Emergency Department |
| Dae Wook Lee, Young Soon Cho, Hoon Lim, Ho Jung Kim |
| Department Of Emergency Medicine, College of Medicine, Bucheon Hospital of Sooncheonhyang University, Korea. lovelydr@schbc.ac.kr |
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| ABSTRACT |
PURPOSE:
To study the use of the Tono-pen to estimate intraocular pressure (IOP) in patients with a headache combined with ocular pain in the emergency department (ED).
METHODS:
We carried out a prospective, single-centre study comparing the Tono-pen to the Goldmann tonometer in 31 patients. The two methods were compared according to measured IOP and diagnosis, and the results were analyzed for correlations.
RESULTS:
31 patients (17 male, 14 female, mean age 51 years) were enrolled. The mean IOP according to the Tonopen and Goldmann were 19 mm Hg (95% CI: 14-25) and 18 mm Hg (95% CI: 12-23), respectively. The mean difference in measurement between the two was 1.8 mmHg. The 95% limits of agreement were -4.5 to 8.1 mmHg, and the correlation coefficient r was 0.976. In those patients with IOP > or = 25 mmHg, four (40%) were diagnosed of glaucoma.
CONCLUSION:
The Tono-pen was a very useful screening tool for patients presenting with headache combined with ocular pain in the ED. |
| Key words:
Intraocular pressure, Tono-pen, Goldmann |
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