摘要
目的比较Pentacam、iTrace和OrbscanⅡZ测量近视眼角膜前表面Q值和屈光力的差异，评估3种方法的一致性。方法横断面研究。选择100例（100眼）近视患者。用Pentacam、iTrace和0rbscanⅡZ测量同一患者角膜前表面的Q值和平均SimK值。用方差分析来比较测量结果，用Bland—Altman法评价测量的一致性。结果Pentacam、iTrace和OrbscanⅡZ测得Q值分别为-0．09±0．12、-0．09±0．09和-0．18±0．10，Orbscan11Z测得到Q值比Pentacam和iTrace负值更大（F=43．06，P〈0．01）。Q值测量中，iTrace和OrbscanIIZ比较，95％一致性界限较窄，为-0．08．0．26：iTrace和Pentacam比较，95％一致性界限较宽，为-0．23～0．23。Pentacam、iTrace和OrbscanIIz测得平均SimK值分别为（43．34±1.37）D、（43．30±1．35）D和（43．56±1．36）D；0rbscanⅡZ测量平均SimK值比Pentacam和iTrace略大．差异有统计学意义（F=23．25，P〈0．01）。平均SimK测量中，iTrace和Pentacam比较，95％一致性界限较窄，为-0．68～0．59D；iTrace和OrbscanIIZ比较，95％一致性界限较宽，为-1．15～0．63D。结论Pentacam、iTrace和orbscanIIz测量近视眼角膜前表面Q值和平均SimK值有差别。测量Q值时3种仪器一致性较差；测量平均SimK值时Pentacam和iTrace一致性较好；可以互相参考。
Objective To compare the myopic anterior corneal surface measurements of the Q value and corneal power provided by Pentacam, iTrace and Orbscan IIz and evaluate the agreement among the 3 methods. Methods This was a cross-sectional study. One hundred eyes were chosen from 100 myopic patients and the Q value and mean Sire K of the anterior corneal surface was measured by Pentacam, iTrace and Orbscan IIz in the same patient＇s eye. Measurement results were compared using analysis of variance and agreement among the measurements was assessed using Bland-Airman plots. Results The Q value measurements were -0.09±0.12, -0.09±0.09, and -0.18± 0.10 with Pentacam, iTrace and Orbscan IIz, respectively. The Q value measurements with Orbscan IIz were lower than those with Pentacam and iTrace （F--43.06, P〈0.01）. For the Q value measurements, the 95% limits of agreement （LoA） was small between iTrace and Orbscan Ilz （from -0.08 to 0.26） and the 95% LoA was large between iTrace and Pentacam （from -0.23 to 0.23）. The respective mean Sire K measurements were 43.34±1.37 D, 43.30±1.35 D and 43.56±1.36 D with Pentacam, iTrace and Orbscan IIz. The mean Sim K measurements with Orbscan IT z were greater than that with Pentaeam and iTrace （F=23.25, P〈0.01）. For the mean Sim K measurements, the 95% LoA was small between iTrace and Pentacam （from -0.68 to 0.59 D） and the 95% LoA was large between iTrace and Orbscan IIz （from -1.15 D to 0.63 D）. Conclusion Measurements of Q value and mean Sire K of the anterior corneal surface of myopes showed statistically significant differences among the 3 instruments. The agreement among the 3 instruments was not comparable for Q value measurements. The agreement between iTrace and Pentacam had comparable results for mean Sire K, and can refer to one another.
出处
《中华眼视光学与视觉科学杂志》
CAS
2013年第3期142-145,共4页
Chinese Journal Of Optometry Ophthalmology And Visual Science
基金
汕头市科技计划支持项目（汕府科[2010]63号）
汕头市重点科技计划项目（汕府科[2010]63号）
