Living with Ultra-Low Vision: An Inventory of Self-Reported Visually Guided Activities by Individuals with Profound Visual Impairment.
Living with Ultra-Low Vision: An Inventory of Self-Reported Visually Guided Activities by Individuals with Profound Visual Impairment.
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DOI：
10.1167/tvst.6.3.10
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发表时间：
2017-05
影响因子：
3
通讯作者：
PLoVR Study Group
中科院分区：
文献类型：
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作者：
Adeyemo O;Jeter PE;Rozanski C;Arnold E;Dalvin LA;Swenor B;Dagnelie G;PLoVR Study Group
了解深度视力障碍（超低视力，ULV）的人如何使用他们剩余的视力。将4 - 6名ULV（较好视力眼的视力≤ 200/500）参与者分为9个焦点组（每组4-6人），并亲自（n = 2）或通过电话（n = 7）会面。讨论以大量活动清单为指导。音频记录被转录并分析视觉活动，然后沿着沿着两个视觉分类-功能域和视觉方面进行分类。后者基于参与者描述的扎根理论分类。据报开展了760项活动。按功能领域分类，他们被归类为阅读/形状识别（10%），移动（17%），视觉运动（24%）和视觉信息收集（49%）。根据视觉方面，它们被分类为对比度（43%）、亮度（17%）、环境照明（9%）、熟悉度（3%）、运动感知（5%）、距离（7%）、大小（9%）、偏心率（5%）、深度感知（1%）和其他/杂项（1%）。对于一项活动来说，不止一个视觉方面可能是至关重要的：参与者报告说，对比度在68%的视觉活动中起作用，其次是亮度（27%），环境照明（14%）和大小（14%）。视觉方面，主要是对比度，被认为是关键因素，使ULV个人进行视觉活动。该清单是人工低视力康复（PLoVR）课程开发研究的一部分，为近盲者的视觉世界提供了一个独特的视角，可用于开发适合ULV人群的视觉功能问卷（VFQ）和视觉性能指标。
To understand how individuals with profound visual impairment (ultra-low vision, ULV) use their remaining vision. Forty-six participants with ULV (visual acuity ≤ 200/500 in the better seeing eye) were divided into nine focus groups (4–6 individuals per group) and met either in person (n = 2) or over the phone (n = 7). Discussions were guided by the Massof Activity Inventory. Audio recordings were transcribed and analyzed for visual activities that were then classified along two visual categorizations – functional domains and visual aspects. The latter was based on a Grounded Theory classification of participants' descriptions. Seven hundred sixty activities were reported. By functional domain they were classified as reading/shape recognition (10%), mobility (17%), visual motor (24%), and visual information gathering (49%). By visual aspects, they were classified as contrast (43%), luminance (17%), environmental lighting (9%), familiarity (3%), motion perception (5%), distance (7%), size (9%), eccentricity (5%), depth perception (1%), and other/miscellaneous (1%). More than one visual aspect may be critical for an activity: participants reported that contrast plays a role in 68% of visual activities, followed by luminance (27%), environmental lighting (14%), and size (14%). Visual aspects, primarily contrast, were found to be critical factors enabling ULV individuals to perform visual activities. This inventory, part of the Prosthetic Low Vision Rehabilitation (PLoVR) curriculum development study, provides a unique perspective into the visual world of the nearly blind, and can be used in the development of a Visual Functioning Questionnaire (VFQ) and visual performance measures suited for ULV populations.