Singh Neeraj K, Jaskulski Matt, Ramasubramanian Viswanathan, Meyer Dawn, Reed Olivia, Rickert Martin E, Bradley Arthur, Kollbaum Pete S
School of Optometry, Indiana University, Bloomington, Indiana.
Optom Vis Sci. 2019 Oct;96(10):733-744. doi: 10.1097/OPX.0000000000001435.
Measurement of ocular aberrations is a critical component of many optical corrections.
This study examines the accuracy and repeatability of a newly available high-resolution pyramidal wavefront sensor-based aberrometer (Osiris by Costruzione Strumenti Oftalmici, Firenze, Italy).
An engineered model eye and a dilated presbyopic eye were used to assess accuracy and repeatability of aberration measurements after systematic introduction of lower- and higher-order aberrations with calibrated trial lenses (sphere +10.00 to -10.00 D, and astigmatic -4.00 and -2.00 D with axis 180, 90, and 45°) and phase plates (-0.57 to 0.60 μm of Seidel spherical aberration defined over a 6-mm pupil diameter). Osiris aberration measurements were compared with those acquired on a previously calibrated COAS-HD aberrometer for foveal and peripheral optics both with and without multizone dual-focus contact lenses. The impact of simulated axial and lateral misalignment was evaluated.
Root-mean-square errors for paraxial sphere (corneal plane), cylinder, and axis were, respectively, 0.07, 0.11 D, and 1.8° for the engineered model and 0.15, 0.26 D, and 2.7° for the presbyopic eye. Repeatability estimates (i.e., standard deviation of 10 repeat measures) for the model and presbyopic eyes were 0.026 and 0.039 D for spherical error. Root-mean-square errors of 0.01 and 0.02 μm, respectively, were observed for primary spherical aberration and horizontal coma (model eye). Foveal and peripheral measures of higher- and lower-order aberrations measured with the Osiris closely matched parallel data collected with the COAS-HD aberrometer both with and without dual-focus zonal bifocal contact lenses. Operator errors of focus and alignment introduced changes of 0.018 and 0.02 D/mm in sphere estimates.
The newly available clinical pyramidal aberrometer provided accurate and repeatable measures of lower- and higher-order aberrations, even in the challenging but clinically important cases of peripheral retina and multifocal optics.
眼像差测量是许多光学矫正的关键组成部分。
本研究考察了一种新的基于高分辨率锥面波前传感器的像差仪（意大利佛罗伦萨Costruzione Strumenti Oftalmici公司的Osiris）的准确性和可重复性。
使用一个人工模型眼和一只散瞳的老视眼，通过用校准的试验镜片（球镜度从 +10.00 到 -10.00 D，散光 -4.00 和 -2.00 D，轴位分别为 180°、90°和 45°）和相位板（在 6 毫米瞳孔直径上定义的 -0.57 到 0.60 微米的赛德尔球差）系统地引入低阶和高阶像差，来评估像差测量的准确性和可重复性。将 Osiris 的像差测量结果与在先前校准的 COAS - HD 像差仪上获取的中央凹和周边光学系统的测量结果进行比较，比较时均使用和不使用多区双焦点隐形眼镜。评估了模拟的轴向和横向失准的影响。
对于人工模型眼，近轴球镜度（角膜平面）、柱镜度和轴位的均方根误差分别为 0.07、0.11 D 和 1.8°，对于老视眼分别为 0.15、0.26 D 和 2.7°。模型眼和老视眼的重复性估计值（即 10 次重复测量的标准差），球镜误差分别为 0.026 和 0.039 D。对于初级球差和水平彗差（模型眼），均方根误差分别为 0.01 和 0.02 微米。使用 Osiris 测量的中央凹和周边的高阶和低阶像差测量值与使用 COAS - HD 像差仪收集的平行数据紧密匹配，无论是否使用双焦点分区双焦隐形眼镜。操作人员聚焦和对准误差导致球镜估计值分别有 0.018 和 0.02 D/mm 的变化。
即使在周边视网膜和多焦点光学等具有挑战性但临床上重要的情况下，新的临床锥面像差仪也能提供准确且可重复的低阶和高阶像差测量。
