Prediction of visual function behind cataract using displacement threshold hyperacuity
Prediction of visual function behind cataract using displacement threshold hyperacuity
复制标题
使用位移阈值超敏锐度预测白内障后的视觉功能
DOI：
10.1111/j.1475-1313.1989.tb00799.x
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发表时间：
1989
影响因子：
2.9
通讯作者：
James Deady
中科院分区：
文献类型：
--
作者：
D. Whitaker;James Deady
对一组等待白内障摘除手术的患者进行了视力和移位阈值超敏视力的测量，并在手术后几周重复进行。此外，还对一组患有各种眼部疾病但没有白内障的患者进行了测量。白内障组的移位阈值仅随混浊程度的加重而轻微增加。另一方面，病理组的移位阈值明显依赖于视力--视力越差，阈值越高。这导致了视觉因素(白内障)和视网膜/神经因素造成的视力损失之间的明显区别。白内障组手术前后移位阈值有较好的相关性，术后阈值略好于术前阈值。结果表明，这项技术可以为患者提供一个很好的指示，以了解白内障摘除术后可能达到的视力质量。
Visual acuity and displacement threshold hyperacuity were measured in a group of patients awaiting cataract extraction, and this was repeated several weeks subsequent to surgery. In addition, measurements were made on a group of patients with various ocular pathologies but without the presence of cataract. Displacement thresholds in the cataract group increased only slightly with the severity of the opacity. On the other hand, displacement thresholds for the pathology group showed a marked dependence upon visual acuity‐the worse the acuity, the higher the threshold. This results in a clear distinction between vision loss due to optical factors (cataract) and retinal/neural factors. There was a good correlation between pre‐and post‐operative displacement thresholds in the cataract group, with post‐operative thresholds being slightly better than pre‐operative thresholds. The results suggest that this technique may offer patients a good indication of the likely quality of vision achieved following cataract extraction.