Icare Rebound Tonometer와 Goldmann 압평 안압계의 비교
Comparison of Icare Rebound Tonometer with Goldmann Applanation Tonometry
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목적: Icare Rebound Tonometer (IRT)와 Goldmann 압평 안압계(GAT)로 측정한 안압을 비교하여 두 안압계로 측정한 안압 사이의상관 관계 및 임상적인 유용성에 대해 알아보고자 하였다. 대상과 방법: 녹내장 및 녹내장 의증 환자 131명을 대상으로 IRT와 GAT를 이용하여 측정된 안압을 비교하고 굴절 이상 및 중심각막두께가 미치는 영향을 분석하였다. 결과: IRT로 측정한 안압과 GAT로 측정한 안압 사이에는 뚜렷한 양의 상관관계를 보였으며 GAT로 측정한 안압이 IRT로 측정한 안압에비해 평균 2.23 ± 3.16 mmHg 높았다. 중심각막두께가 두꺼울수록 GAT로 측정한 안압은 높게 측정되었으며 IRT를 이용하여 측정시에도 역시 높게 측정되었다. GAT로 안압 측정시 구면대응치 -5 디옵터 이상의 근시안에서 나머지 안에 비해 +1.50 ± 0.68 mmHg 낮게 측정되었고, IRT로 측정시에도 +1.88 ± 0.75 mmHg 낮게 측정되었다. 결론: IRT는 GAT와 높은 상관관계를 보였으나 2 mmHg 정도 낮게 측정되었고 중심각막두께가 얇을수록, 근시 도수가 높을수록 낮게측정될 수 있음을 고려해야 할 것으로 생각한다.
Abstract
Purpose: To compare Icare rebound tonometer (IRT) and Goldmann applanation tonometer (GAT) and investigate the clinical usefulness of IRT. Methods: In a retrospective study of 131 eyes with glaucoma and glaucoma suspect, intraocular pressure (IOP) was measured with IRT and GAT. The correlation between IRT and GAT and the influence of refractive error (spherical equivalent;SE) and central corneal thickness (CCT) were analyzed. Results: A distinct correlation between IRT and GAT was found. IOP measured with GAT was 2.23 ± 3.16 mm Hg higher than with IRT (p < 0.001). As CCT increased, IOP was measured higher with both GAT and IRT. IOP in myopic eyes (SE ≥ -5 diopter) was measured relatively lower than in hyperopic eyes (SE < -5 diopter) with GAT (+1.50 ± 0.68 mm Hg) and IRT (+1.88 ± 0.75 mm Hg). Conclusions: IRT showed strong correlation with GAT, but IOP measured approximately 2 mm Hg lower. The IOP tends to measure lower at low CCT and in myopic eyes.
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