J Korean Soc Emerg Med.  2009 Apr;20(2):210-214.

A Study of the Tono-pen for Assessing Ocular Pressure in Patients with Headache Combined with Ocular Pain in the Emergency Department

• Lee DW
• Cho YS
• Lim H
• Kim HJ

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.

Keyword

Intraocular pressure; Tono-pen; Goldmann

MeSH Terms

Emergencies
Female
Headache
Humans
Intraocular Pressure
Male
Mass Screening
Prospective Studies