Purchase this article with an account.
Marie-Celine Lorenzini, Jonathan Jarry, Walter Wittich; The impact of using eSight Eyewear on functional vision and oculo-motor control in low vision patients. Invest. Ophthalmol. Vis. Sci. 2017;58(8):3267.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
Low vision rehabilitation has yet to reliably demonstrate the impact of interventions on the location and stability of a preferred retinal locus, and to show the close link between changes in oculo-motor control and functional improvements. Recently, eSight Corp. (Toronto, Canada) has developed a wearable, electronic low vision aid, eSight Eyewear, intended to improve the functional visual performance of people with low vision. The goal of this study was to evaluate if the use of eSight Eyewear improves visual function and whether it is associated with better oculo-motor control.
Seven men and six women (age 36 to 63, M = 49 SD =10) with low vision (VA 20/63 to 20/400 in the better eye) affected by hereditary visual diseases were recruited. They completed measures of distance and near visual acuity (DVA, NVA), contrast sensitivity (CS), and reading speed (RS), at baseline, and after 3 months of using the eSight Eyewear, with and without the device. At each time point, fixation location and stability were assessed using the Optos OCT SLO microperimeter (Optos pic, Scotland). Participants returned home with the device for 3 months, with a training guide containing exercises for 1 month.
Within-subject analysis of variance of DVA revealed a significant interaction effect of time and device use, indicating that acuity improved with time, however only with the device, p = .01(Figure). Complete fixation assessments across the two time points were available in 5 participants. Fixation location remained the same for all participants as categorized by the OCT SLO (% of fixation recorded within 2 degrees), whereby improvements of fixation stability (% of fixations recorded within 2 and 4 degrees) were recorded for 3 participants. Fixation stability using the bivariate contour ellipse area did not show a significant difference after 3 months, p = .20.
In all participants, we found improvements of DVA, NVA, RS and CS using the eSight Eyewear, indicating that the device improves visual function. Results also indicate that a 3-months utilisation improves DVA, indicating the benefit of training and/or practice. Moreover, eSight Eyewear does not modify fixation location but may improve its stability. Further studies, including more participants and a longer training period, are needed to confirm if both fixation location and stability are influenced by head-mounted displays.
This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.
This PDF is available to Subscribers Only