Stewart Catherine E, Hussey Alex, Davies Nigel, Moseley Merrick J
Department of Optometry and Visual Science, City University, Northampton Square, London, UK.
Ophthalmic Physiol Opt. 2006 Nov;26(6):597-601. doi: 10.1111/j.1475-1313.2006.00407.x.
The validity and repeatability of visual acuity measures are particularly important in the detection and monitoring of childhood visual anomalies such as amblyopia. The repeatability and sensitivity of a new computerised visual acuity test, 'Staircased Procedure' is compared with the now gold standard visual acuity test, the early treatment of diabetic retinopathy study (ETDRS). Twenty-seven visually normal children (mean age: 6.7 +/- 1.1 years) and 27 children with amblyopia (mean age: 6.1 +/- 0.7 years) were tested with the ETDRS and Staircased Procedure. A retest was administered 4-5 weeks later and 30 min later for the visually normal and the amblyopic children, respectively. The staircased procedure produced significantly better visual acuity than the ETDRS for visually normal and amblyopic children. Repeatability was similar for both tests (ETDRS: 0.11 log units; staircased procedure: 0.13 log units). In conclusion, the Staircased Procedure was an acceptable test with high repeatability and validity.
视力测量的有效性和可重复性在检测和监测儿童视力异常（如弱视）方面尤为重要。一种新的电脑化视力测试“阶梯程序”的可重复性和敏感性与目前的金标准视力测试——糖尿病视网膜病变早期治疗研究（ETDRS）进行了比较。对27名视力正常的儿童（平均年龄：6.7±1.1岁）和27名弱视儿童（平均年龄：6.1±0.7岁）进行了ETDRS和阶梯程序测试。4 - 5周后对视力正常儿童进行重新测试，30分钟后对弱视儿童进行重新测试。对于视力正常和弱视儿童，阶梯程序产生的视力明显优于ETDRS。两种测试的可重复性相似（ETDRS：0.11对数单位；阶梯程序：0.13对数单位）。总之，阶梯程序是一种具有高可重复性和有效性的可接受测试。
