Higher-order aberrations and best-corrected visual acuity in Native American children with a high prevalence of astigmatism.
Higher-order aberrations and best-corrected visual acuity in Native American children with a high prevalence of astigmatism.
复制标题
DOI：
10.1016/j.jaapos.2015.05.004
复制
发表时间：
2015-08
期刊：
影响因子：
--
通讯作者：
Schwiegerling J
中科院分区：
文献类型：
--
作者：
Miller JM;Harvey EM;Schwiegerling J
确定高度散光人群儿童的高阶像差（hoa）是否与正常人群不同，以及hoa是否与散光和最佳矫正视力降低有关。研究对象为218名5-9岁的Tohono O 'odham印第安儿童。使用手持式Shack-Hartmann传感器（SHS）获得非睫状体麻痹的HOA测量。有符号（z06s至z14s）和无符号（z06u至z14u）波前像差泽尼克系数Z（3,−3）至Z（4,4）被重新缩放，瞳孔直径为4毫米，并与成人群体标准进行比较。还测量了睫状体麻痹性屈光和最佳矫正的logMAR字母视力（BCVA）。回归分析评估散光（J0）和hoa对BCVA的贡献。平均均方根（RMS） HOA为0.191±0.072 μm，显著高于总体标准（0.100±0.044 μm）。所有无符号HOA系数（z06u ~ z14u）和除z09s、z10s和z11s外的所有有符号系数均显著大于总体规范值。BCVA降低与散光（J0）和球差（z12u）相关，而与RMS昏迷无关，J0的影响约为z12u的4倍。Tohono O 'odham儿童的hoa高于人口平均水平。散光和无符号球差与视力下降有关，但球差的影响很小，没有临床意义。
To determine whether higher-order aberrations (HOAs) in children from a highly astigmatic population differ from population norms and whether HOAs are associated with astigmatism and reduced best-corrected visual acuity. Subjects were 218 Tohono O’odham Native American children 5–9 years of age. Noncycloplegic HOA measurements were obtained with a handheld Shack-Hartmann sensor (SHS). Signed (z06s to z14s) and unsigned (z06u to z14u) wavefront aberration Zernike coefficients Z(3,−3) to Z(4,4) were rescaled for a 4 mm diameter pupil and compared to adult population norms. Cycloplegic refraction and best-corrected logMAR letter visual acuity (BCVA) were also measured. Regression analyses assessed the contribution of astigmatism (J0) and HOAs to BCVA. The mean root-mean-square (RMS) HOA of 0.191 ± 0.072 μm was significantly greater than population norms (0.100 ± 0.044 μm. All unsigned HOA coefficients (z06u to z14u) and all signed coefficients except z09s, z10s, and z11s were significantly larger than population norms. Decreased BCVA was associated with astigmatism (J0) and spherical aberration (z12u) but not RMS coma, with the effect of J0 about 4 times as great as z12u. Tohono O’odham children show elevated HOAs compared to population norms. Astigmatism and unsigned spherical aberration are associated with decreased acuity, but the effects of spherical aberration are minimal and not clinically significant.