Vision In National Health and Nutrition Exam Survey

国家健康和营养检查调查是一项正在进行的、全国性的、全面的健康调查，对象是美国非制度化的平民人口。1999年增加了一项远景评估，目前正在进行中；今年对议定书进行了修订，将在2003年数据收集周期生效。所有12岁以上的样本都要接受视力评估，其中包括测量佩戴眼镜的人的眼镜处方，测试戴眼镜和不戴眼镜的样本的远距离视力(眼镜/隐形眼镜)和客观屈光度(还包括评估眼睛的角膜曲率)。对50岁及以上的人进行近视视力评估。此外，还收集了与视力相关的功能性测量的个人访谈数据，对象是49岁以上的人。NHANES中视力部分的数据将被用来估计美国人群中视力损害的流行率，描述美国人群中屈光不正的分布，评估视力丧失对功能能力的影响，并将视觉损害与其他健康和疾病指标联系起来。患病率数据将被用作2010年健康人的基线衡量标准。

The National Health and Nutrition Examination Survey is an on-going, national, comprehensive health survey of the civilian, non-institutionalized US population. A vision assessment was added in 1999 and is on-going; revisions to the protocol were made this year and will be effective for the 2003 data collection cycle. All sample persons aged 12+ years undergo a vision assessment in which measures of the eyeglass prescription in people who wear glasses for distance, tests the distance visual acuity of sample persons with and without correction (glasses/contacts) and an objective refraction (incorporating also an evaluation of the corneal curvature of the eye) are obtained. A visual acuity at near is assessed in persons age 50 years and over. In addition, personal interview data on functional measures related to vision are collected on people over the age of 49 years. Data from the vision component in NHANES will be used to estimate the prevalence of visual impairment in the U.S. population, describe the distribution of refractive error in the U.S. population, evaluate the impact of vision loss on functional abilities, and relate visual impairment to other health and disease measures. The prevalence data will be used as baseline measures for Healthy People 2010.