Hashemi Hassan, Heydarian Samira, Khabazkhoob Mehdi, Yekta Abbasali, Emamian Mohammad Hassan, Fotouhi Akbar
Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran.
Department of Rehabilitation Science, School of Allied Medical Sciences, Mazandaran University of Medical Sciences, Sari, Iran.
J Optom. 2019 Apr-Jun;12(2):99-110. doi: 10.1016/j.optom.2018.12.002. Epub 2019 Mar 14.
To determine the agreement and validity of keratometric measurements in children with the Nidek ARK-510A auto-refractokeratometer compared to rotating Scheimpflug imaging with Pentacam and biograph with Lenstar LS 900.
This study was conducted on 5620 schoolchildren aged 6-12 years in Shahroud, Iran. Minimum and maximum keratometry values and corneal astigmatism magnitude were compared by calculation of Paired difference, interclass correlation coefficient, and 95% limits of agreement (LoA) between devices.
After applying the exclusion criteria, 4215 right eyes were enrolled into the study. Mean minimum keratometry with Nidek ARK-510A, Pentacam, and Lenstar was 43.13±1.51, 43.14±1.48, and 42.87±1.46 diopters (D), respectively, and mean maximum keratometry was 43.97±1.59, 44.00±1.56, and 43.75±1.54D, respectively. Nidek ARK-510A overestimated minimum and maximum keratometry by 0.25±0.37 and 0.22±0.41, respectively, compared to Penatcam. The LoA between Nidek ARK-510A and Pentacam for minimum and maximum keratometry measurements were -0.98 to 0.47D and -1.02 to 0.57D, respectively. The LoA between Nidek ARK-510A and Lenstar for minimum and maximum keratometry measurements were -0.70 to 0.72D and -0.79 to 0.85D, respectively. The agreement between devices was best in emmetropes, worst in hyperopes. For astigmatic vector components, the agreements between devices were poor but best agreement was between Nidek ARK-510A and Pentacam.
Keratometry measurement with Nidek ARK-510A was not significantly different from Pentacam and Lenstar, and this device can be used in screening programs in emmetropes.
比较Nidek ARK - 510A自动验光角膜曲率计与Pentacam旋转式Scheimpflug成像系统以及Lenstar LS 900生物测量仪在儿童角膜曲率测量中的一致性和有效性。
本研究在伊朗沙赫鲁德的5620名6至12岁学童中进行。通过计算配对差值、组内相关系数以及各设备之间的95%一致性界限（LoA），比较最小和最大角膜曲率值以及角膜散光量。
应用排除标准后，4215只右眼纳入研究。Nidek ARK - 510A、Pentacam和Lenstar的平均最小角膜曲率分别为43.13±1.51、43.14±1.48和42.87±1.46屈光度（D），平均最大角膜曲率分别为43.97±1.59、44.00±1.56和43.75±1.54D。与Pentacam相比，Nidek ARK - 510A高估最小和最大角膜曲率分别为0.25±0.37和0.22±0.41。Nidek ARK - 510A与Pentacam在最小和最大角膜曲率测量上的LoA分别为 - 0.98至0.47D和 - 1.02至0.57D。Nidek ARK - 510A与Lenstar在最小和最大角膜曲率测量上的LoA分别为 - 0.70至0.72D和 - 0.79至0.85D。设备之间的一致性在正视眼中最佳，在远视眼中最差。对于散光矢量分量，设备之间的一致性较差，但Nidek ARK - 510A与Pentacam之间的一致性最佳。
Nidek ARK - 510A测量角膜曲率与Pentacam和Lenstar无显著差异，该设备可用于正视眼的筛查项目。
