Harvey Erin M, Dobson Velma, Miller Joseph M, Clifford-Donaldson Candice E, Green Tina K, Messer Dawn H, Garvey Katherine A
Department of Ophthalmology and Vision Science, The University of Arizona, Tucson, 85711, USA.
J AAPOS. 2009 Oct;13(5):466-71. doi: 10.1016/j.jaapos.2009.08.013.
To evaluate the accuracy of the Welch Allyn SureSight in noncycloplegic measurements of astigmatism as compared to cycloplegic Retinomax K+ autorefractor measurements of astigmatism in children from a Native American population with a high prevalence of high astigmatism.
Data are reported for 825 3- to 7-year-old children with no ocular abnormalities. Each child had a Retinomax K+ cycloplegic measurement of right eye astigmatism with a confidence rating > or =8 and 3 attempts to obtain a SureSight measurement on the right eye.
SureSight measurement success rates did not differ significantly across age or measurement confidence rating (<6 vs > or =6). Ninety-six percent of children had at least 1 measurement (any confidence), and 89% had at least 1 measurement with confidence at the manufacturer's recommended value (> or =6). Overall, the SureSight tended to overestimate astigmatism. If the SureSight measurement had any dioptric value (0.00 D to 3.00 D), astigmatism of 2.00 D or less was likely to be present. If the SureSight showed astigmatism beyond the instrument's dioptric range (>3.00 D), Retinomax K+ measurements indicated that >2.00 D of astigmatism was present in 136 of 157 (86.6%). In cooperative children for whom the SureSight would not give a reading, 32 of 34 (94%) had >3.00 D of astigmatism.
The SureSight does not provide an accurate, quantitative measure of amount of astigmatism. However, it does allow accurate categorization of amount of astigmatism as < or =2.00 D, >2.00 D, or >3.00 D, and it has high measurement success rate in young children.
在散光患病率较高的美国原住民儿童中，评估伟伦SureSight非睫状肌麻痹验光测量散光的准确性，并与Retinomax K+睫状肌麻痹自动验光仪测量散光的准确性进行比较。
报告了825名3至7岁无眼部异常儿童的数据。每名儿童均接受了Retinomax K+睫状肌麻痹下右眼散光测量，置信度≥8，并进行了3次右眼SureSight测量尝试。
SureSight测量成功率在不同年龄或测量置信度（<6 vs ≥6）之间无显著差异。96%的儿童至少有1次测量结果（任何置信度），89%的儿童至少有1次测量结果的置信度达到制造商推荐值（≥6）。总体而言，SureSight倾向于高估散光度数。如果SureSight测量有任何屈光度值（0.00 D至3.00 D），则可能存在2.00 D或更低的散光。如果SureSight显示散光超过仪器屈光度范围（>3.00 D），Retinomax K+测量表明，157例中有136例（86.6%）存在>2.00 D的散光。对于SureSight无法给出读数的合作儿童，34例中有32例（94%）存在>3.00 D的散光。
SureSight不能提供散光量的准确、定量测量。然而，它确实能够将散光量准确分类为≤2.00 D、>2.00 D或>3.00 D，并且在幼儿中具有较高的测量成功率。
