■这项研究的结果对球面和散光屈光不正对整体的影响提出了新的见解,角膜和内部像差,并可能提供对正视化过程和视觉功能发展的清晰理解。
■本研究旨在评估整体,大量儿童的角膜和内部高阶像差以及屈光不正的球面和散光分量(幅度和角度)。
■总共311名7-8岁的儿童根据球面等效屈光(近视,正视和远视);散光的大小(无,低和中等);和散光角度(符合规则,违反规则和倾斜)。折射误差和总体,使用OPD-ScanIII工作站测量角膜和内部高阶像差.
■关于球面等效折射,近视眼具有更大的均方根(RMS)整体高阶值,总球形,四油和二次散光像差,和内部高阶,与正视眼相比,总球面和四油像差。散光的大小与所有整体RMS像差和内部高阶呈正相关。昏迷,完全昏迷,总球面和四油像差。与规则散光和倾斜散光的眼睛相比,规则散光的眼睛显示出更高的昏迷和完全昏迷的RMS值。
■高阶像差取决于屈光不正的球面和散光分量。这些发现增强了当前对正视化过程和视觉功能发育的理解。
UNASSIGNED: The results of this study present novel insights into the impact of spherical and astigmatic refractive errors on overall, corneal and internal aberrations and may provide a clear understanding of the emmetropisation process and the development of visual function.
UNASSIGNED: This study aimed to assess the association between overall, corneal and internal higher-order aberrations and the spherical and astigmatic components (magnitude and angle) of refractive error in a large sample of children.
UNASSIGNED: A total of 311 children aged 7 - 8 years old were classified based on spherical equivalent refraction (myopic, emmetropic and hyperopic); magnitude of astigmatism (none, low and moderate); and angle of astigmatism (with-the-rule, against-the-rule and oblique). Refractive error and overall, corneal and internal higher-order aberrations were measured using the OPD-Scan III workstation.
UNASSIGNED: Regarding spherical equivalent refraction, myopic eyes had greater root mean square (RMS) overall higher-order values, total spherical, tetrafoil and secondary astigmatism aberrations, and internal higher-order, total spherical and tetrafoil aberrations in comparison to emmetropic eyes. The magnitude of astigmatism was positively associated with all overall RMS aberrations and with internal higher order, coma, total coma, total spherical and tetrafoil aberrations. Eyes with with-the-rule astigmatism showed higher RMS values of coma and total coma compared to eyes with against-the-rule and oblique astigmatism.
UNASSIGNED: Higher-order aberrations are dependent on the spherical as well as astigmatic components of refractive error. These findings enhance the current understanding of the emmetropisation process and visual function development.