Vision In Nhanes

国家健康和营养检查调查是一项持续的，全国性的，全面的健康调查的平民，非制度化的美国人口。1999年增加了视力评估，目前正在进行。所有年龄在12岁以上的样本人都接受视力评估，其中测量戴远距眼镜的人的近视处方，测试样本人在矫正和未矫正（眼镜/隐形眼镜）的情况下的远视力，并获得客观屈光（还包括对眼睛角膜曲率的评估）。对50岁及以上的人进行近视力评估。此外，收集了49岁以上人群的个人访谈数据，这些数据涉及与视力相关的功能测量。NHANES中视力部分的数据将用于估计美国人群中视力障碍的患病率，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，并将视力障碍与其他健康和疾病措施联系起来。患病率数据将用作2010年健康人群中视力目标的基线测量。 数据收集正在进行中。视力检查规程已进一步完善，以便更好地评估严重视力障碍的频率，特别是因为它涉及那些因各种原因后来没有参加在移动的单位进行的视力检查的人。同样在2005年生效的是，在对所有20岁以上的研究参与者进行家庭访谈时，将询问有关功能性视力的问题。 自1999年以来收集的视力数据尚未由国家卫生统计中心发布用于分析目的。经过密集的质量控制工作，预计将于2004年晚些时候公开发布1999-2002年期间收集的视力数据。

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. 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 a vision objective in Healthy People 2010. Data collection is on-going. The vision interview protocol has been further refined to better assess the frequency of severe visual impairment, particularly as it relates to those who, for various reasons, subsequently do not participate in the vision examination component as conducted in the mobile units. Also effective in 2005, questions on functional vision will be asked during the home interview of all study participants over age 20 years. Vision data, collected since 1999, have not yet been released by the National Center for Health Statistics for analytic purposes. After intensive quality control efforts, a public release of vision data collected over the 1999-2002 time period is projected to occur later in 2004.