Nilsson Maria, Svanberg Maria, Schalin Sara, Brautaset Rune L
Unit of Optometry, Department of Clinical Neuroscience, Karolinska Insitutet, Stockholm, Sweden.
Clin Exp Optom. 2012 Jan;95(1):48-53. doi: 10.1111/j.1444-0938.2011.00667.x. Epub 2011 Oct 24.
The most common way to examine vision is to measure visual acuity using letter charts. The Rarebit fovea test was developed for detection of small defects of foveal function at a stage before they cause abnormal visual acuity. In a recent study, the RFT was well tolerated in a smaller group of children between seven and nine years of age; however, the number of subjects in that study was small for the determination of reference values, and therefore the aim of the present study was to establish reference values for a larger group of children aged between six and 10 years and to evaluate the learning effect after repeated tests.
Rarebit fovea test data were collected from a group of 108 subjects aged between six and 10 years as part of a screening program at a compulsory school in Stockholm, Sweden. All subjects had good visual acuity and minor refractive errors. They underwent two Rarebit fovea test examinations on one occasion.
Rarebit fovea test results ranged from a median mean hit rate of 94.0 to 97.5 per cent for pre-school and third-year children, respectively. For the entire group of children the median mean hit rate was 96 per cent (range 57 to 100). The third-year children performed significantly better than the pre-school (p < 0.01) and first-year children (p < 0.05). A significant improvement from the first to second test run was noticed in all groups.
The Rarebit fovea test proved to be well tolerated among children in a group of six to 10 year olds and more than 90 per cent of children were considered to give reliable results close to what is normal for adults. It would be interesting to further investigate the potential of the Rarebit fovea test for evaluation of foveal function in children.
检查视力最常用的方法是使用字母视力表测量视力。瑞比特中央凹测试是为了在中央凹功能出现小缺陷但尚未导致视力异常之前进行检测而开发的。在最近一项研究中，七至九岁的一小群儿童对瑞比特中央凹测试耐受性良好；然而，该研究中的受试者数量对于确定参考值来说较少，因此本研究的目的是为年龄在六至十岁的更大群体儿童建立参考值，并评估重复测试后的学习效果。
作为瑞典斯德哥尔摩一所义务教育学校筛查项目的一部分，收集了108名年龄在六至十岁儿童的瑞比特中央凹测试数据。所有受试者视力良好且有轻微屈光不正。他们在同一时间接受了两次瑞比特中央凹测试检查。
学前儿童和三年级儿童的瑞比特中央凹测试结果中位数平均命中率分别为94.0%至97.5%。对于所有儿童，中位数平均命中率为96%（范围为57%至100%）。三年级儿童的表现明显优于学前儿童（p < 0.01）和一年级儿童（p < 0.05）。所有组在第一次测试到第二次测试中都有显著进步。
瑞比特中央凹测试在六至十岁儿童中耐受性良好，超过90%的儿童被认为能给出接近成人正常水平的可靠结果。进一步研究瑞比特中央凹测试在评估儿童中央凹功能方面的潜力将会很有趣。
