Purpose To evaluate the clinical effect of TECNIS symfony intraocular lens (IOL) implantation and identify the effect of kappa angle on the depth of focus (DOF) after implantation. Methods This prospective clinical st...
详细信息
Purpose To evaluate the clinical effect of TECNIS symfony intraocular lens (IOL) implantation and identify the effect of kappa angle on the depth of focus (DOF) after implantation. Methods This prospective clinical study included consecutive patients who underwent cataract surgery and TECNIS symfony IOL implantation at the Daqing Oilfield General Hospital from January 2019 to September 2019. Patients were divided into three groups according to the preoperative kappa angle (r): A (0 < r <= 0.2), B (0.2 < r <= 0.4), and C (r > 0.4). Uncorrected visual acuity was performed preoperatively and at 7 days, 1 month, and 3 months postoperatively. Synthetical optometry, higher-order aberrations, and defocus examinations were performed at 3 months postoperatively. Single-factor analysis of variance and Spearman correlation coefficient were used for data analysis. Results The uncorrected visual acuity values of the three groups were significantly improved postoperatively, compared with preoperative values (p < 0.001). Three months postoperatively, the best-corrected visual acuity values of the three groups were 0.11 +/- 0.02 logarithm of the minimum angle of resolution (logMAR), 0.09 +/- 0.03 logMAR, and 0.11 +/- 0.03 logMAR, respectively. Spherical equivalent (SE) values were 0.37 +/- 0.08 D, 0.41 +/- 0.06 D, and 0.42 +/- 0.06 D, respectively. Best-corrected visual acuity and SE did not significantly differ among the three groups (F = 1.254, p = 0.135;F = 0.849, p = 0.228). There was no significant difference in SE between the three groups (F = 1.658, p = 0.312). Moreover, higher-order aberrations did not significantly differ among the three groups (p > 0.05). The kappa angle was negatively correlated with the postoperative DOF (r = -4.341, p = 0.026). Three months postoperatively, 54.55% of patients exhibited DOF >= 3 D, while 92.42% of patients exhibited DOF >= 2 D. The ranges of DOF in the three groups were 3.18 +/- 0.27 D, 2.83 +/- 0.80 D, and 2.57 +/- 0.89 D, respectively
The goal of this work is to present improvements for PHP programmers, brought by symfony framework. En example auction application wrote in PHP using symfony will be used as a model for presentation. Conclusions will ...
详细信息
ISBN:
(纸本)9789665536789
The goal of this work is to present improvements for PHP programmers, brought by symfony framework. En example auction application wrote in PHP using symfony will be used as a model for presentation. Conclusions will be based on the experience of the author including the knowledge from books and articles, that he read during the process of creating the application.
Purpose: To investigate the impact of residual astigmatism on visual acuity (VA) after the implantation of a novel extended range of vision (ERV) intraocular lens (IOL) based on the correction of spherical and chromat...
详细信息
Purpose: To investigate the impact of residual astigmatism on visual acuity (VA) after the implantation of a novel extended range of vision (ERV) intraocular lens (IOL) based on the correction of spherical and chromatic aberration. Method: The study enrolled 411 patients bilaterally implanted with the ERV IOL Tecnis symfony. Visual acuity and subjective refraction were analyzed during the 4- to 6-month follow-up. The sample of eyes was stratified for four groups according to the magnitude of postoperative refractive astigmatism and postoperative spherical equivalent. Results: The astigmatism analysis included 386 eyes of 193 patients with both eyes of each patient within the same cylinder range. Uncorrected VAs for distance, intermediate and near were better in the group of eyes with lower level of postoperative astigmatism, but even in eyes with residual cylinders up to 0.75 D, the loss of VA lines was clinically not relevant. The orientation of astigmatism did not seem to have an impact on the tolerance to the residual cylinder. The SE evaluation included 810 eyes of 405 patients, with both eyes of each patient in the same SE range. Uncorrected VAs for distance, intermediate and near, were very similar in all SE groups. Conclusion: Residual cylinders up to 0.75 D after the implantation of the Tecnis symfony IOL have a very mild impact on monocular and binocular VA. The Tecnis symfony IOL shows a good tolerance to unexpected refractive surprises and thus a better “sweet spot”.
暂无评论