Development of a Simple Method for Testing Visual Acuity on Severely Handicapped Children

我们通常使用朗道环法来测试视力。但要测试严重残疾儿童的视力是很困难的，因为他们必须说出方法中某些环的方向。我们一直在开发的一种新方法没有必要说。在这种方法中，根据眼睛的照片或摄像机作品来判断眼睛的视觉敏锐度。当闪光灯在黑暗中闪到眼睛上时，这个设备会将眼睛记录在胶片或录像带上。然后我们就可以从中找到折射的反常现象。我们用这种方法对374人进行了调查。这一结果与自动屈光仪的结果密切相关(相关系数为0.889)。我们试着检查了150名残疾儿童，成功地测试了148名儿童.

We usually use the Landolt Ring method for testing visual acuity. But it is difficult to test visual acuity of severely handicapped children, since they must say about the direction of some rings in the method. A new method which we have been developing doesn't have necessity of saying. On this method,the eyes are judged visual acuity from the pictures or video camera works of them. When the storobe flashes on the eyes in the dark,this device records the eyes on films or video tapes. Then we can find the anomalies of refraction from them. We examined 374people by this method. The result of this correlated closely with he result of Auto Refractomater (correlation coefficcent ; 0.889). And we tried to examine 150 andicapped children, and succeeded to test 148 children.