هم خواني تونومترهاي شيوتز و تونوپن در اندازه گيري فشار داخل چشمي مبتلايان به گلوكوم مادرزادي اوليه

Measurement of Intraocular Pressure Using Schiotz vs Tono-pen Tonometers in Patients with Primary Congenital Glaucoma

Purpose: To compare the Tono-pen and Schiotz tonometers in measurement of intraocular pressure (IOP) in patients with primary congenital glaucoma. Methods: This study was conducted on 38 eyes of 20 patients with primary congenital glaucoma. All measurements were performed under general anesthesia. One minute after receiving Halothane 3% IOP was determined by Tono-pen and then by Schiotz tonometers. Data were analyzed by regression analysis and Bland-Altman bias plot. Results: Mean age of patients was 19.4±14.5 months and 15 (75%) of them were male. Glaucoma was bilateral in 18 (90%) and unilateral in 2 (10%) subjects. Mean IOP measured by Tono-pen and Schiotz tonometers was 19.39±8.51 and 18.84±8.9 mmHg, respectively. These tonometers had good concordance in determination of IOP in primary congenital glaucoma according to the results of regression analysis and Bland-Altman bias plot. Conclusion: Considering the sample size of this study, the Tono-pen and Schiotz tonometers are highly concordant regarding intraocular pressure measurement in children with primary congenital glaucoma.