J Refract Surg. 2014 Jul;30(7):468-73. doi: 10.3928/1081597X-20140521-01. Epub 2014 May 28.
To evaluate ocular biomechanical metrics given by the CorVis ST (Oculus, Inc., Berlin, Germany) in a population of healthy Brazilian patients.
An observational and cross-sectional study involving 1 eye randomly selected from 90 healthy patients. Studied parameters (including deformation amplitude, first applanation time, highest concavity time, second applanation time, first applanation length, second applanation length, curvature radius highest concavity, curvature radius normal, velocity in, and velocity out) derived from the CorVis ST were correlated to central corneal thickness from the Pentacam (Oculus, Inc.). Differences between data on the basis of gender were evaluated.
Mean patient age was 35.80 ± 12.83 years (range: 21.07 to 78.84 years). Mean central corneal thickness was 547.50 ± 32.00 μm (range: 490 to 647 μm) and mean spherical equivalent refraction was -3.29 ± 3.69 diopters (range: -9.50 to +10.37 diopters). Mean deformation amplitude was 1.05 ± 0.08 mm (range: 0.91 to 1.26 mm). Highest concavity time was 18.38 ± 0.93 ms (range: 16.95 to 21.07 ms). Intraocular pressure was 16.43 ± 2.15 mm Hg (range: 11.50 to 21.0 mm Hg). First applanation time was 8.32 ± 0.33 ms (range: 7.53 to 9.12 ms) and second applanation time was 23.80 ± 0.44 ms (range: 22.76 to 24.95 ms). First applanation length (max) was 2.07 ± 0.38 mm (range: 1.20 to 3.10 mm) and second applanation length (max) was 2.37 ± 0.47 mm (range: 1.33 to 4.12 mm). Curvature radius highest concavity was 11.09 ± 2.06 mm (range: 7.58 to 15.98 mm) and curvature radius normal was 7.59 ± 0.67 mm (range: 6.82 to 11.02 mm). Velocity in was 0.21 ± 0.05 m/s (range: 0.16 to 0.72 m/s) and velocity out was -0.33 ± 0.07 m/s (range: -0.72 to -0.20 m/s). Studied parameters were not associated with gender.
Eight of 11 ocular biomechanical metrics given by the CorVis ST were associated with central corneal thickness, but the influence of central corneal thickness on these measurements was low.
评估 CorVis ST（德国 Oculus 公司）在巴西健康人群中的眼生物力学参数。
这是一项观察性和横断面研究，纳入了 90 例健康患者中随机选取的 1 只眼。研究参数（包括变形幅度、首次压平时间、最大凹陷时间、第二次压平时间、第一次压平长度、第二次压平长度、最大凹陷曲率半径、正常曲率半径、内进速度和外出速度）由 CorVis ST 得出，并与 Pentacam（德国 Oculus 公司）得出的中央角膜厚度相关联。评估了基于性别的数据差异。
患者平均年龄为 35.80±12.83 岁（范围：21.07 至 78.84 岁）。平均中央角膜厚度为 547.50±32.00μm（范围：490 至 647μm），平均等效球镜屈光度为-3.29±3.69 屈光度（范围：-9.50 至+10.37 屈光度）。平均变形幅度为 1.05±0.08mm（范围：0.91 至 1.26mm）。最大凹陷时间为 18.38±0.93ms（范围：16.95 至 21.07ms）。眼内压为 16.43±2.15mmHg（范围：11.50 至 21.0mm Hg）。首次压平时间为 8.32±0.33ms（范围：7.53 至 9.12ms），第二次压平时间为 23.80±0.44ms（范围：22.76 至 24.95ms）。首次压平长度（最大）为 2.07±0.38mm（范围：1.20 至 3.10mm），第二次压平长度（最大）为 2.37±0.47mm（范围：1.33 至 4.12mm）。最大凹陷曲率半径为 11.09±2.06mm（范围：7.58 至 15.98mm），正常曲率半径为 7.59±0.67mm（范围：6.82 至 11.02mm）。内进速度为 0.21±0.05m/s（范围：0.16 至 0.72m/s），外出速度为-0.33±0.07m/s（范围：-0.72 至-0.20m/s）。研究的参数与性别无关。
CorVis ST 给出的 11 个眼生物力学参数中的 8 个与中央角膜厚度相关，但中央角膜厚度对这些测量的影响较低。
