Rubio Marcos, Hernández Carlos S, Seco Enrique, Perez-Merino Pablo, Casares Ignacio, Dave Shivang R, Lim Daryl, Durr Nicholas J, Lage Eduardo
Department of Electronics and Communications Technology, Universidad Autónoma de Madrid, Madrid, Spain.
PlenOptika, Inc., Cambridge, Massachusetts.
Optom Vis Sci. 2019 Oct;96(10):726-732. doi: 10.1097/OPX.0000000000001427.
There is a critical need for tools that increase the accessibility of eye care to address the most common cause of vision impairment: uncorrected refractive errors. This work assesses the performance of an affordable autorefractor, which could help reduce the burden of this health care problem in low-resource communities.
The purpose of this study was to validate the commercial version of a portable wavefront autorefractor for measuring refractive errors.
Refraction was performed without cycloplegia using (1) a standard clinical procedure consisting of an objective measurement with a desktop autorefractor followed by subjective refraction (SR) and (2) with the handheld autorefractor. Agreement between both methods was evaluated using Bland-Altman analysis and by comparing the visual acuity (VA) with trial frames set to the resulting measurements.
The study was conducted on 54 patients (33.9 ± 14.1 years of age) with a spherical equivalent (M) refraction determined by SR ranging from -7.25 to 4.25 D (mean ± SD, -0.93 ± 1.95 D). Mean differences between the portable autorefractor and SR were 0.09 ± 0.39, -0.06 ± 0.13, and 0.02 ± 0.12 D for M, J0, and J45, respectively. The device agreed within 0.5 D of SR in 87% of the eyes for spherical equivalent power. The average VAs achieved from trial lenses set to the wavefront autorefractor and SR results were 0.02 ± 0.015 and 0.015 ± 0.042 logMAR units, respectively. Visual acuity resulting from correction based on the device was the same as or better than that achieved by SR in 87% of the eyes.
This study found excellent agreement between the measurements obtained with the portable autorefractor and the prescriptions based on SR and only small differences between the VA achieved by either method.
迫切需要能够提高眼部护理可及性的工具，以解决视力损害的最常见原因：未矫正的屈光不正。这项工作评估了一种价格实惠的自动验光仪的性能，它有助于减轻资源匮乏社区中这一医疗保健问题的负担。
本研究的目的是验证一款用于测量屈光不正的便携式波前自动验光仪的商业版本。
在未使用睫状肌麻痹剂的情况下进行验光，方法包括：(1) 一种标准临床程序，即先用台式自动验光仪进行客观测量，然后进行主观验光（SR）；(2) 使用手持式自动验光仪。使用 Bland-Altman 分析并通过将视力（VA）与根据测量结果设置的试镜架进行比较，来评估两种方法之间的一致性。
该研究对 54 名患者（年龄 33.9 ± 14.1 岁）进行，通过 SR 确定的等效球镜度（M）屈光度范围为 -7.25 至 4.25 D（平均值 ± 标准差，-0.93 ± 1.95 D）。便携式自动验光仪与 SR 之间的平均差异，对于 M、J0 和 J45 分别为 0.09 ± 0.39、-0.06 ± 0.13 和 0.02 ± 0.12 D。对于等效球镜度，该设备在 87% 的眼睛中与 SR 的差值在 0.5 D 以内。根据波前自动验光仪和 SR 结果设置的试镜架所获得的平均视力分别为 0.02 ± 0.015 和 0.015 ± 0.042 logMAR 单位。在 87% 的眼睛中，基于该设备进行矫正所得到的视力与 SR 所达到的视力相同或更好。
本研究发现，便携式自动验光仪获得的测量结果与基于 SR 的处方之间具有极佳的一致性，并且两种方法所达到的视力仅有微小差异。
