Bowers Alex R, Keeney Karen, Peli Eli
Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts 02114, USA.
Arch Ophthalmol. 2008 May;126(5):657-64. doi: 10.1001/archopht.126.5.657.
To determine the functional utility for general mobility of peripheral prism glasses, a novel visual field expansion device for hemianopia, in a large-scale, community-based, multicenter study with long-term follow-up.
Forty-three participants with homonymous hemianopia were fitted with temporary press-on Fresnel peripheral prism segments of 40 prism diopters. Follow-up questionnaires evaluating functional benefits for mobility were administered in the office at week 6. Participants who continued wearing the prisms were interviewed again by telephone after a median of 12 months. Primary outcome measures included clinical success (a clinical decision to continue wear) and 5-point ratings of prism helpfulness for obstacle avoidance when walking.
Thirty-two participants (74%) continued prism wear at week 6, and 20 (47%) were still wearing the prisms after 12 months (median time, 8 hours per day). These participants rated the prism glasses as very helpful for obstacle avoidance and reported significant benefits for obstacle avoidance in a variety of mobility situations. Success rates varied among clinic groups (27%-81%), with higher rates at the clinics that fitted more patients.
Our results demonstrate the functional utility of peripheral prism glasses as a general mobility aid for patients with hemianopia.
在一项大规模、基于社区的多中心长期随访研究中，确定用于偏盲的新型视野扩展装置——周边棱镜眼镜对一般移动性的功能效用。
43名同向性偏盲参与者佩戴了40棱镜度的临时压贴式菲涅尔周边棱镜片。在第6周时在办公室进行评估移动性功能益处的随访问卷调查。继续佩戴棱镜的参与者在中位时间为12个月后通过电话再次接受访谈。主要结局指标包括临床成功（继续佩戴的临床决定）以及行走时棱镜对避免障碍物帮助程度的5分制评分。
32名参与者（74%）在第6周时继续佩戴棱镜，20名（47%）在12个月后仍在佩戴（中位佩戴时间为每天8小时）。这些参与者将棱镜眼镜评为对避免障碍物非常有帮助，并报告在各种移动情况下避免障碍物有显著益处。各诊所组的成功率有所不同（27%-81%），配镜患者较多的诊所成功率较高。
我们的结果证明周边棱镜眼镜作为偏盲患者一般移动辅助工具的功能效用。
