Wittich Walter, Lorenzini Marie-Céline, Markowitz Samuel N, Tolentino Michael, Gartner Scott A, Goldstein Judith E, Dagnelie Gislin
School of Optometry, Université de Montréal, Montreal, Quebec, Canada.
CRIR/Centre de réadaptation MAB-Mackay du CIUSSS du Centre-Ouest-de-l'Île-de-Montréal, Montreal, Quebec, Canada.
Optom Vis Sci. 2018 Sep;95(9):774-784. doi: 10.1097/OPX.0000000000001262.
Head-mounted low vision devices have received considerable attention in recent years owing to rapidly developing technology, facilitating ease of use and functionality. Systematic clinical evaluations of such devices remain rare but are needed to steer future device development.
The purpose of this study was to investigate, in a multicenter prospective trial, the short- and medium-term effects of a head-worn vision enhancement device (eSight Eyewear).
Participants aged 13 to 75 years with stable vision (distance acuity, 20/60 to 20/400; visual field diameter >20°) were recruited across six sites. Data were collected at baseline (no device), at fitting (with device), and after 3 months of everyday use. Outcome measures were visual ability measured by the Veterans Affairs Low Vision Visual Functioning Questionnaire 48, distance acuity (Early Treatment Diabetic Retinopathy Study), reading performance (MNREAD chart), contrast sensitivity (MARS chart), face recognition, and a modified version of the Melbourne Low Vision Activities of Daily Living (ADL) Index.
Among the 51 participants, eSight introduction immediately improved distance acuity (0.74 ± 0.28 logMAR), contrast sensitivity (0.57 ± 0.53 log units), and critical print size (0.52 ± 0.43 logMAR), all P < .001, without any further change after 3 months; reading acuity improved at fitting (0.56 ± 0.35 logMAR) and by one additional line after 3 months, whereas reading speed only slightly increased across all three time points. The Melbourne ADL score and face recognition improved at fitting (P < .01) with trends toward further improvement at 3 months. After 3 months of use, Veterans Affairs Low Vision Visual Functioning Questionnaire 48 person measures (in logits) improved: overall, 0.84, P < .001; reading, 2.75, P < .001; mobility, 0.04, not statistically significant; visual information, 1.08, P < .001; and visual motor, 0.48, P = .02.
eSight introduction yields immediate improvements in visual ability, with face recognition and ADLs showing a tentative benefit of further use. Overall, visual ability, reading, and visual information showed greatest benefit with device use. Further studies need to examine benefits of practice and training and possible differential effects of underlying pathology or baseline vision.
近年来，由于技术的快速发展，头戴式低视力设备因其使用便捷和功能多样而备受关注。对此类设备进行系统的临床评估仍然很少见，但对于指导未来设备的开发是必要的。
本研究的目的是在一项多中心前瞻性试验中，调查一种头戴式视力增强设备（eSight眼镜）的短期和中期效果。
在六个地点招募了年龄在13至75岁之间、视力稳定（远视力，20/60至20/400；视野直径>20°）的参与者。在基线（未佩戴设备）、配镜时（佩戴设备）以及日常使用3个月后收集数据。结果测量指标包括通过退伍军人事务部低视力视觉功能问卷48测量的视觉能力、远视力（糖尿病视网膜病变早期治疗研究）、阅读表现（MNREAD图表）、对比敏感度（MARS图表）、人脸识别以及墨尔本低视力日常生活活动（ADL）指数的修改版。
在51名参与者中，引入eSight后立即改善了远视力（0.74±0.28对数最小分辨角）、对比敏感度（0.57±0.53对数单位）和临界印刷字体大小（0.52±0.43对数最小分辨角），所有P<.001，3个月后无进一步变化；阅读视力在配镜时改善（0.56±0.35对数最小分辨角），3个月后又提高了一行，而阅读速度在所有三个时间点仅略有增加。墨尔本ADL评分和人脸识别在配镜时改善（P<.01），3个月时有进一步改善趋势。使用3个月后，退伍军人事务部低视力视觉功能问卷48个人测量指标（以对数单位计）改善：总体，0.84，P<.001；阅读，2.75，P<.001；活动能力，0.04，无统计学意义；视觉信息，1.08，P<.001；视觉运动，0.48，P=.02。
引入eSight可立即改善视觉能力，人脸识别和日常生活活动显示出进一步使用的初步益处。总体而言，视觉能力、阅读和视觉信息在使用设备时受益最大。需要进一步研究以检验练习和训练的益处以及潜在病理或基线视力的可能差异影响。
