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约翰斯·霍布金斯医学研究所的研究人员发展了一项简易的眼试验法,用来检查维生素A缺乏。因为此试验不需要任何血液检测的设备,所以在发展中国家检查易患维生素A缺乏的儿童特别有用。约翰斯·霍布金斯的达纳眼科预防中心主任 Alfred Sommer说,本方法通常用来诊断中年和老年人常见的”干眼症”,其程序是将滤纸放在眼表面,在移动滤纸时便将一层上皮细胞带下来。再将纸固定于福尔马林中,然后染色,以后在显微镜下检查。因为滤纸已被福尔马林固定,所以最后的一步能无限
Researchers at Johns Hopkins Institute of Medicine have developed a simple eye test to check for vitamin A deficiency. Because this test does not require any blood testing equipment, it is particularly useful in developing countries to check for children susceptible to vitamin A deficiency. Alfred Sommer, director of Johns Hopkins’ Dana Eye Prevention Center, said the method is often used to diagnose “dry eye” common in middle-aged and older adults by placing the filter paper on the surface of the eye and moving the filter paper Take a layer of epithelial cells down. The paper was then fixed in formalin, then stained and examined under a microscope later. Because the filter paper has been formalin fixed, so the last step can be unlimited