Rubin G S, Adamsons I A, Stark W J
Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21205.
Arch Ophthalmol. 1993 Jan;111(1):56-61. doi: 10.1001/archopht.1993.01090010060027.
We assessed vision before and after uncomplicated extracapsular cataract extraction and intraocular lens implantation in 72 symptomatic patients with acuity equal to or better than 20/80 and no other ocular abnormality. Contrast sensitivity was measured with the Pelli-Robson Letter Chart (Metropia Ltd, Cambridge, England) and disability glare was measured under daytime conditions with the Brightness Acuity Tester (Mentor O&O Inc, Norwell, Mass) and under nighttime conditions with a computer-controlled video display. Prior to surgery there was significant disability glare that was not correlated with acuity. There was also a loss in contrast sensitivity that was moderately correlated with acuity (r = -.43; P < .001). Following surgery, most patients' scores returned to normal on all tests. Improvement in disability glare and contrast sensitivity was independent of improvement in acuity. Furthermore, patients with the poorest preoperative vision were as likely to regain normal function after surgery as those with the best preoperative vision.
我们评估了72例有症状的患者，这些患者视力等于或优于20/80且无其他眼部异常，在其进行无并发症的囊外白内障摘除及人工晶状体植入术前和术后的视力情况。使用佩利-罗布森字母视力表（英国剑桥的Metropia有限公司）测量对比敏感度，在白天条件下使用亮度视力测试仪（美国马萨诸塞州诺韦尔的Mentor O&O公司）以及在夜间条件下使用计算机控制的视频显示器测量失能眩光。手术前存在明显的失能眩光，且与视力无关。还存在对比敏感度的下降，其与视力呈中度相关（r = -0.43；P < 0.001）。手术后，大多数患者在所有测试中的得分均恢复正常。失能眩光和对比敏感度的改善与视力的改善无关。此外，术前视力最差的患者术后恢复正常功能的可能性与术前视力最佳的患者相同。
