优化膜镜片的处方:算法和常规折射和不规则角膜过度折射的比较
Rafaela S Alves-de-Carvalho1, Rute J Macedo-de-Araújo1, José M González-Méijome1
1Clinical & Experimental Optometry Research Lab (CEORLab), Physics Center of Minho and Porto Universities (CF-UM-UP), University of Minho, Braga, Portugal.
概括
以算法为基础的折射方法与用于不规则角膜的常规技术相比,产生了更积极的球形等价值. 这两种方法都取得了类似的视力敏度结果,这表明该算法是用状镜片过度折射的可行替代方案.
科学领域:
- 眼科医生 眼科 眼科
- 眼镜测量是指眼睛的测量.
- 视觉科学 视觉科学 视觉科学
背景情况:
- 角膜异常对准确的主观折射提出了挑战.
- 膜透镜 (SLs) 用于管理不规则的角膜,但需要精确的过度折射.
- 传统的主观折射方法在复杂的情况下可能不那么准确.
研究的目的:
- 将传统的主观折射的准确性和一致性与基于算法的方法进行比较.
- 评估这些方法在患有角膜不规则,有或没有状镜片 (SLs) 的患者.
主要方法:
- 研究了十个有不规则角膜的受试者的19只眼睛.
- 使用常规方法 (视网膜镜 + 主观) 和基于算法的系统 (哈特曼-沙克异常计 + Vision-R 800) 进行了非cycloplegic折射.
- 用和没有SLs进行测量,评估球体等价值,标成分和高/低对比视力敏度 (HCVA/LCVA).
主要成果:
- 与传统方法相比,基于算法的方法产生了更积极的球体等价值 (平均差异: -0.80至 -1.04 D).
- 在这两种方法之间,在单眼高对比度视力敏度 (HCVA) 或低对比度视力敏度 (LCVA) 中没有发现任何显著差异,无论是否有SLs.
- 这两种技术都显示出可比的视敏度结果.
结论:
- 基于算法的折射方法为不规则的角膜提供了更积极的球形等价物.
- 传统方法和基于算法的方法都产生了可比的视力敏度结果.
- 基于算法的折射是一种潜在的替代方案,用于在穿着SLs的不规则角膜患者的过度折射.
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