[Effect of a tight necktie on intraocular pressure].

Introduction: Any factor causing constriction of the neck may lead to an increase in intraocular pressure. A tight necktie may result in increasing intraocular pressure, which could lead to an erroneous diagnosis and treatment of ocular hypertension or even glaucoma. This study was aimed at evaluating the effect of a tight necktie on intraocular pressure measurement using Goldmann applanation tonometry.
Material and Methods: This study included forty eyes of 20 patients with primary open angle glaucoma and 20 healthy controls (all male). Intraocular pressure was measured without a necktie, 3 minutes after placing a tight necktie and 3 minutes after loosening it. Student's t-test was used to analyze the data between two groups. The intraocular pressure measurements were subjected to paired t-test. The va lue p < 0.05 was considered statistically significant. A possible correlation between the age of subjects and intraocular pressure values was analyzed using linear regression (Pearson).
Results: A statistically significant difference was found in intraocular pressure readings in all three measurements between two tested groups (p < 0.05). When analyzed within groups, statistical significance in intraocular pressure readings was found after loosening the necktie (< 0.05). No correlation between the age of subjects and increased intraocular pressure was found in either tested group of subjects after the necktie had been tightened (r2 = 0.006, p = 0.70 for primary open angle patients, r2 = 0.07, p = 0. 22 for healthy controls).
Conclusion: Wearing a tight necktie for a limited period of time during the day could be considered as a possible risk factor for glaucoma development.