...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Clinical ophthalmology >Objective Quantification of Image Quality and Optical Scatter Before and After Nd:YAG Capsulotomy Using a Double-Pass Technique
【24h】

Objective Quantification of Image Quality and Optical Scatter Before and After Nd:YAG Capsulotomy Using a Double-Pass Technique

机译：客观量化图像质量和光学散射在ND：YAG胶囊术用双通技术

获取原文
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Purpose: The?purpose?of?this?study?is?to evaluate and compare the correlation between changes in vision and HD Analyzer dual-pass metrics versus changes in vision and conventional subjective slit lamp gradings in pseudophakic patients with posterior capsular opacity undergoing neodymium:yttrium-aluminum-garnet (Nd:YAG) capsulotomy. Patients and Methods: High contrast?(HC) and low contrast (LC)?best spectacle-corrected distance visual acuity (BCVA) and HD Analyzer evaluation were prospectively performed on patients with mild-to-moderate posterior capsular opacification (PCO) and monofocal and accommodating intraocular lens implants. Differences between pre- and post-operative measurements were calculated, along with the correlation of HD Analyzer metrics and slit lamp grading to changes in visual acuity. Results: Following Nd:YAG capsulotomy (n=29), there was statistically significant improvement in HC-BCVA and LC-BCVA, decrease in optical scatter, and corresponding improvement in Strehl ratio and HD Analyzer values at all contrast levels tested (p≤ 0.05). Pearson test showed a high correlation between the improvement in HC-BCVA (r coefficient = 0.78) and LC-BCVA (r coefficient = 0.71) to the improvement in Objective Scatter Index (OSI). There was a higher correlation of change in HC-BCVA to pre-op OSI (rsup2/sup=0.61) than to the subjective PCO grading score (rsup2/sup = 0.19). There was also a higher correlation of change in LC-BCVA to pre-op OSI (rsup2/sup = 0.49) than to subjective grading (rsup2/sup = 0.16). Conclusion: The HD Analyzer provides objective measurements of forward light scatter (ie, light directed towards the retina) that can assist with both PCO grading and prediction of improvement of visual quality after YAG laser capsulotomy with higher accuracy than conventional slit lamp assessment based upon backscatter (ie, light traveling to the observer) in patients tested with monofocal and accommodating intraocular lens implants.
机译：目的：？目的？这是什么？研究？是？评估和比较视觉和高清分析仪双通测量的变化之间的相关性与初粒性透明度后囊孔隙患者的视觉和传统主体狭缝灯刻度的相关性：钇 - 铝 - 石榴石（ND：YAG）Capsulotomy。患者和方法：高对比度α（HC）和低对比度（LC）？最佳眼镜矫正距离视力（BCVA）和高清分析仪评估，对患有轻度至中等后囊孔隙（PCO）和单焦点的患者进行了前瞻性地进行并容纳眼内透镜植入物。计算前后测量和后期后测量之间的差异，以及高清分析仪度量和狭缝灯的相关性与视力变化的相关性。结果：次数：YAG胶囊术（N = 29），HC-BCVA和LC-BCVA的统计学显着改善，光散减小，并且在所有对比水平上进行的斯特勒比比和HD分析仪值的相应改善（P≤ 0.05）。 Pearson测试显示HC-BCVA（R系数= 0.78）和LC-BCVA（R系数= 0.71）的改善与目标散射指数（OSI）的改善之间的高相关性。与主体PCO分级得分（R 2 = 0.61）相比，HC-BCVA变化的相关性较高，而不是主观PCO分级得分（R 2 = 0.19）。 LC-BCVA的变化与Pre-OP OSI（R 2 = 0.49）的变化较高的相关性比主体分级（R 2 = 0.16）。结论：高清分析仪提供了前向光散射（即，指向视网膜的光）的客观测量，可以帮助PCO分级和在YAG激光胶囊术后的视觉质量提高预测，其基于反向散射的传统狭缝灯评估更高的精度。 （即，通过单焦透镜植入物测试的患者进行到观察者的光线）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号