각막굴절교정수술 후 펜타캠을 이용한 안압 보정방법의 비교
Comparison of Intraocular Pressure Correction Programs in Pentacam after Corneal Refractive Surgery
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목적: 각막굴절교정수술 후 PentacamⓇ에 내장된 다섯 가지 안압 보정값의 정확성을 알아 보고자 하였다. 대상과 방법: 에피라식(epipolis laser in situ keratomileusis)을 받은 62명 124안에 대하여 골드만 압평 안압계로 수술 전 및 술 후 6개월에 안압을 측정하였고, 얻은 안압 측정값을 Pentacam에 내장된 다섯 가지 보정법에 입력하여 안압 보정값을 산출하고 서로 비교하였다. 결과: 수술 전과 후 안압은 각각 15.75 ± 2.24 mmHg, 10.72 ± 2.31 mmHg로 술 후 안압이 술 전에 비하여 통계학적으로 유의하게낮았다(p＜0.001). Pentacam에 내장된 다섯 가지 보정법 중에서 Ehlers 보정법은 수술 전과 술 후 안압 측정치의 유의한 차이가 없었고(p=0.228), 술 후 보정값이 술 전 GAT의 측정값과 통계적으로 유의한 차이가 없었다(p=0.413). 결론: Pentacam에 내장된 다섯 가지 안압 보정법 중에서 Ehlers 보정법이 다른 방법과 비교하여 가장 정확한 방법으로 판단되며, 각막굴절교정수술 후 실제보다 낮게 측정된 안압을 보정하는 데 유용할 것으로 생각한다.
Abstract
Purpose: To evaluate the accuracy of Pentacam® built-in 5 intraocular pressure (IOP) correction programs used to measure the IOP of patients who received corneal refractive surgery. Methods: IOP of 124 eyes from 62 patients who underwent epipolis laser in situ keratomileusis was measured with Goldmann applanation tonometry (GAT) at 6 months pre- and post-operatively. The collected data was input into Pentacam®,calculated by 5 correction programs, Ehlers, Shah, Dresden, Orssengo / Pye, Kohlhaas, and compared. Results: The GAT-based pre- and post-operative IOP was 15.75 ± 2.24 mm Hg, and 10.72 ± 2.31 mm Hg, respectively, revealing the post-operative IOP to be significantly lower than the pre-operative IOP (p < 0.001). Among the 5 correction programs within Pentacam®, Ehlers program showed little difference between pre- and post-operative IOP values (p = 0.228)and the post-operative correction value showed no significant difference with the pre-operative GAT value (p = 0.413). Conclusions: The Ehlers program is the most accurate among the 5 Pentacam® correction programs evaluated in the present study, and can be a useful tool for correcting the true IOP of patients which tends to be higher after corneal refractive surgery.
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