Abstract
Purpose :
Performing accurate refraction measurement at home will elevate eyecare and increase accessibility for many. The purpose of this study is to determine if the refraction results obtained from measurements in an at-home setting yields Best Corrected Visual Acuity (BCVA) results within 1 line of 20/20 (LogMAR 0.0). the study utilizes the EyeQue VisionCheck which is a smartphone based (figure 1), handheld, ophthalmic refractometer.
Methods :
An open-label distributed study to assess the BCVA using glasses with correct PD created from the VisionCheck measurement results included 35 subjects (Female = 13, Male = 22). The age range was between 30-80, with mean 50.4 and SD = 24. Subjects were measured with VisionCheck and had OD Spherical Equivalent (SE) range of -6.0D and +2.25D and OS SE between -6.25D and +1.75D. Each subject performed 3 Visual Acuity tests without correction and 3 tests with glasses made from the VisionCheck results. BCVA measurements were done with the EyeQue Insight, an ETDRS visual acuity screener with logMAR range of 0.0 to 1.0.
Results :
Statistical analysis was conducted using a student t-test for each eye separately as well as for both eyes measurement. The analysis included the mean and confidence intervals for both the BCVA measurement without any correction and for that with the VisionCheck based correction. The analysis showed significance for the confidence interval (p <0.001). Table 1 shows a summary of the analysis.
Conclusions :
Both the mean acuity and the confidence intervals are significantly lower for the VisionCheck based correction compared to uncorrected vision. The EyeQue VisionCheck refraction measurements on average provides BCVA within 1 letter of 20/20. This study indicates that at home self-refraction is practical and a promising alternative to in office testing.
This abstract was presented at the 2022 ARVO Annual Meeting, held in Denver, CO, May 1-4, 2022, and virtually.