Use of bioptic amorphic lenses to expand the visual field in patients with peripheral loss
Use of bioptic amorphic lenses to expand the visual field in patients with peripheral loss
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DOI：
10.1097/00006324-199807000-00021
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发表时间：
1998-07-01
影响因子：
1.4
通讯作者：
McMahon, T
中科院分区：
文献类型：
--
作者：
Szlyk, JP;Seiple, W;McMahon, T
目的。目的：测试一种周边视觉增强镜片对视网膜色素变性(RP)、脉络膜血症和Usher综合征II型患者的有效性。15名周边视野丧失的患者接受了为期3个月的驾驶和其他日常活动中使用非晶状体的培训。采用交叉研究设计，其中一组8名患者在6个月研究的前3个月接受培训，另一组7名患者在后3个月接受培训。在研究开始、3个月和6个月时，所有患者都接受了一系列的临床、心理物理、功能、机动性和驾驶评估测试。评估测试是根据任务中涉及的主要视觉技能进行编码的。这些视觉技能包括：识别、外围检测、扫描、跟踪、视觉记忆和移动性。结果。经过训练，患者在评估测试中的所有视觉技能类别都有改善，总体改善了37%。两组之间的改善程度没有显著差异。视野范围较小的受试者在外围检测和扫描任务上表现出显著的改善。那些在研究的前3个月接受培训的患者在6个月的测试中保持了他们的技能。结论。周边视力丧失的患者可能会受益于一项康复计划，该计划将低视力训练与生物视觉配置的非晶状体相结合。
Purpose. To test the effectiveness of a bioptic form of a peripheral vision-enhancement lens in patients with retinitis pigmentosa (RP), choroideremia, and Usher's syndrome Type II. Methods. Fifteen patients with peripheral visual field loss were trained in the use of the amorphic lenses for driving and other everyday activities for a 3-month period. A cross-over study design was used, where one group of eight patients received training during the first 3 months of the 6-month study, and another group of seven patients received training during the second 3 months. All patients were administered a battery of clinical, psychophysical, functional, mobility, and driving assessment tests at the beginning of the study, at 3 months, and at 6 months. The assessment tests were coded according to the primary visual skill involved in the task. These visual skills included: recognition, peripheral detection, scanning, tracking, visual memory, and mobility. Results. After training, the patients showed improvement in all visual skills categories on the assessment tests, with overall improvement of 37%. There was no significant difference in the levels of improvement between the two groups. Those with smaller visual field extents showed significantly greater improvement on peripheral detection and scanning tasks. Those patients trained during the first 3 months of the study maintained their skills when tested at the 6-month point. Conclusion. Patients with peripheral vision loss may benefit from a rehabilitation program which combines low vision training with amorphic lenses in a bioptic configuration.