Director of Research and Surgery, Black Mammoth Surgical, Medellín, Colombia.
Department of Anesthesiology, Universidad CES, Medellín, Colombia.
Indian J Ophthalmol. 2022 May;70(5):1533-1537. doi: 10.4103/ijo.IJO_3006_21.
Accurate refraction is arguably the most important parameter for a successful laser vision correction surgery and is based on a combination of manifest and cycloplegic refraction. Wavefront-based objective refraction may be useful in the evaluation of patients. So far, the reliability of objective refraction as measured using the Pentacam AXL Wave has not been published in the literature.
This was a prospective study including a total of 168 eyes belonging to 84 young non-presbyopic patients evaluated for refractive surgery. Pentacam AXL Wave full sequence was taken for all patients. Then, a clinician who was unaware of the objective refraction results performed a full physical examination, including manifest refraction starting from an autorefractometer value. All refraction values were transferred to astigmatic power vectors as per the Thibos method. Reliability of the different vectors and a unifying blur value were compared using Spearman correlation, Bland-Altman plot, and intraclass correlation coefficient.
The mean age was 28.8 ± 5.4 years, with a female preponderance (60.7%). The correlation between both eyes was high. The difference in M vector between subjective and objective refraction was 0.16 D, while the difference was 0.04 and 0.01 D for the J and J vectors, respectively. Paired samples Student t was non-significant for all comparisons. Spearman rho correlations were high (0.666-0.924, all P < 0.001). Intraclass correlation coefficients were also high (0.890-0.966). Bland-Altman plots did not demonstrate any systematic errors.
Wavefront-based refractive refraction obtained using the Pentacam AXL Wave is highly agreeable and correlated with measurements obtained by manifest subjective refraction.
准确的屈光度数可以说是激光视力矫正手术成功的最重要参数,它是基于客观和睫状肌麻痹验光的结合。基于波前的客观验光可能对患者评估有用。到目前为止,使用 Pentacam AXL Wave 测量的客观验光的可靠性尚未在文献中公布。
这是一项前瞻性研究,共纳入 84 名年轻非远视患者的 168 只眼,这些患者正在接受屈光手术评估。对所有患者均进行 Pentacam AXL Wave 全序列检查。然后,一位不了解客观验光结果的临床医生进行了全面的体格检查,包括从自动验光仪值开始的主观验光。根据 Thibos 方法,所有验光值均转换为散光力向量。使用 Spearman 相关、Bland-Altman 图和组内相关系数比较不同向量和统一模糊值的可靠性。
平均年龄为 28.8±5.4 岁,女性占优势(60.7%)。双眼相关性较高。主观和客观验光的 M 向量之间的差异为 0.16D,而 J 和 J 向量之间的差异分别为 0.04 和 0.01D。所有比较的配对样本学生 t 检验均无统计学意义。Spearman rho 相关系数均较高(0.666-0.924,均 P<0.001)。组内相关系数也较高(0.890-0.966)。Bland-Altman 图未显示任何系统误差。
使用 Pentacam AXL Wave 获得的基于波前的屈光折射与通过主观客观折射测量的结果高度一致且相关。