Design and Clinical Evaluation of a Handheld Wavefront Autorefractor
Design and Clinical Evaluation of a Handheld Wavefront Autorefractor
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DOI：
10.1097/opx.0000000000000732
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发表时间：
2015-12-01
影响因子：
1.4
通讯作者：
Lage, Eduardo
中科院分区：
文献类型：
--
作者：
Durr, Nicholas J.;Dave, Shivang R.;Lage, Eduardo
目的介绍一种新的自动验光仪设计，旨在以低成本制造，并评估其在测量屈光不正的性能。方法我们开发了一种手持式，开放式自动验光仪（QuickSee [QS]），使用一种简化的方法来波前传感，放弃移动部件和昂贵的组件。招募成人受试者（n = 41），采用三种方法进行非睫状肌麻痹验光：（1）QS原型，（2）Grand Seiko WR-5100 K（GS）自动验光仪，和（3）主观验光（SR）。使用Bland-Altman分析评价QS和GS之间的一致性。结果两台自动验光仪测量的等效球镜度与SR具有良好的相关性，相关系数r = 0.97。两种自动验光仪也彼此一致，等效球镜度95%置信区间为0.84屈光度（D）。对于功率向量的任何分量，每种目标器械的准确度之间的差异均无统计学显著性（M、J（0）和J（45）分别为p = 0.55、0.41和0.18）。GS测得的球面和柱面功率同意在0.25 D内的SR在49和82%的眼睛，分别，而QS测得的球面和柱面功率同意在0.25 D内的SR在74和87%的eyes.Conclusions的原型autorefractor在匹配的功率矢量测量SR表现出相当的性能GS autorefractor。
Purpose To introduce a novel autorefractor design that is intended to be manufacturable at low cost and evaluate its performance in measuring refractive errors.Methods We developed a handheld, open-view autorefractor (the QuickSee [QS]) that uses a simplified approach to wavefront sensing that forgoes moving parts and expensive components. Adult subjects (n = 41) were recruited to undergo noncycloplegic refraction with three methods: (1) a QS prototype, (2) a Grand Seiko WR-5100K (GS) autorefractor, and (3) subjective refraction (SR). Agreements between the QS and GS were evaluated using a Bland-Altman analysis. The accuracy of both autorefractors was evaluated using SR as the clinical gold standard.Results The spherical equivalent powers measured from both autorefractors correlate well with SR, with identical correlation coefficients of r = 0.97. Both autorefractors also agree well with each other, with a spherical equivalent power 95% confidence interval of 0.84 diopters (D). The difference between the accuracy of each objective device is not statistically significant for any component of the power vector (p = 0.55, 0.41, and 0.18, for M, J(0), and J(45), respectively). The spherical and cylindrical powers measured by the GS agree within 0.25 D of the SR in 49 and 82% of the eyes, respectively, whereas the spherical and cylindrical powers measured by the QS agree within 0.25 D of the SR in 74 and 87% of the eyes, respectively.Conclusions The prototype autorefractor exhibits equivalent performance to the GS autorefractor in matching power vectors measured by SR.