J Korean Ophthalmol Soc > Volume 58(6); 2017 > Article
Journal of the Korean Ophthalmological Society 2017;58(6):685-691.
DOI: https://doi.org/10.3341/jkos.2017.58.6.685    Published online June 15, 2017.
Comparison of Intraocular Pressure via Goldmann-applanation Tonometry and TonoPen in Thyroid-associated Ophthalmopathy Accompanying Restrictive Strabismus.
Jun Sik Kim, Eun Ji Lee, Namju Kim
Department of Ophthalmology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea. opticdisc@gmail.com
제한사시를 동반한 갑상샘눈병증 환자에서 골드만압평안압계와 토노펜의 안압측정치 비교 분석
서울대학교 의과대학 분당서울대학교병원 안과학교실
Correspondence:  Eun Ji Lee,
Email: opticdisc@gmail.com
Received: 15 December 2016   • Revised: 11 March 2017   • Accepted: 25 May 2017
To compare the intraocular pressure (IOP) measured using Goldmann-applanation tonometry (GAT) and Tonopen® tonometry and to evaluate the factors influencing the measurement difference in patients with thyroid-associated ophthalmopathy (TAO)-related restrictive strabismus. METHODS: In 50 eyes of 50 patients who were diagnosed with TAO, IOP measurements were taken using both GAT and a Tonopen® and were subsequently compared between the devices. Factors influencing the measurement difference between the devices were determined, including the restriction of eyeball movement, eyeball deviation, exophthalmometry, central corneal thickness, refractive errors, and blood thyroid hormone levels. RESULTS: In the TAO patients, the GAT-measured IOP was higher than for Tonopen® (16.1 ± 4.7 vs. 13.8 ± 4.5 mmHg, respectively, p < 0.001). As the restriction of vertical eyeball movement increased, the IOP difference between the devices also increased (p = 0.037). The absolute IOP difference between the devices was positively correlated with restrictions in vertical eyeball movement (p = 0.027), degree of vertical strabismus (p = 0.021), and central corneal thickness (p ≤ 0.031). CONCLUSIONS: In patients with TAO accompanying vertical eyeball movement restriction, potential errors in IOP measurements should be considered between the different IOP-measuring devices.
Key Words: Goldmann-applanation tonometry;Intraocular pressure;Restrictive strabismus;Thyroid-associated ophthalmopathy;Tonopen®

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