A new specialized visual acuity chart for amblyopic children aged 3-5 years old:development and its clinical applications
A new specialized visual acuity chart for amblyopic children aged 3-5 years old:development and its clinical applications作者机构：Biomedical Engineering Institute of Xi'an Jiaotong University Yijishan Hospital of Wannan Medical College Department of Ophthalmologythe Second People's Hospital of Anqing
出 版 物：《International Journal of Ophthalmology(English edition)》 (国际眼科杂志（英文版）)
年 卷 期：2013年第6卷第6期
页 面：844-850页
核心收录：
学科分类：1002[医学-临床医学] 100212[医学-眼科学] 10[医学]
主 题：amblyopic children Weber-Fechner law international standard logarithmic visual acuity chart
摘 要：AIM:To Introduce a new specialized visual acuity chart for amblyopic children aged 3-5 years old and its clinical ***:The new visual acuity chart and notations were designed based on Weber-Fechner *** optotypes were red against a white background and were specially shaped four basic geometric symbols:circle,square,triangle,and cross.A regular geometric progression of the optotype sizes and distribution was employed to arrange in 14 *** progression rate of the optotype size between two lines was 1.2589 and the testing distance was *** acuity score could be recorded as logMAR notation or decimal *** diagnostic criteria for amblyopia established by consensus statement on diagnosis of amblyopia(2011)among members of the Strabismus and Pediatric Ophthalmology Group,Ophthalmology Society,Chinese Medical Association(SPOGOSCMA)were illustrated in the new visual acuity ***:When assessing visual acuity in children aged 3-5 years old,this new visual acuity chart that consists of four symmetrical shapes(triangle,square,cross,and circle)overcame an inability to recognize the letters of the alphabet and difficulties in designating the direction of black abstract symbols such as the tumbling’E’or Landolt’C’,which the subjects were prone to lose interest *** visual acuity score may be recorded indifferent notations:decimal acuity and *** two notations can be easily converted each other in the new eye *** measurements of this new chart not only showed a significant correlation and a good consistency with the international standard logarithmic visual acuity chart(r=0.932,P0.01),but also indicated a high test-retest reliability(89%of retest scores were within 0.1 logMAR units of the initial test score).CONCLUSION:The results of this study support the validity and reliability of distance visual acuity measurements using the new eye chart in children aged3 to 5 years over a wide range of visual acuities,
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