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A new method of extrapolating the sweep pattern visual evoked potential acuity
Zhou, Peng1; Zhao, Ming-Wei1; Li, Xiao-Xin1; Hu, Xiao-Feng2; Wu, Xi1; Niu, Lan-Jun1; Yu, Wen-Zhen1; Xu, Xiu-Lan1
关键词sweep pattern visual evoked potential logMAR acuity visual acuity
刊名DOCUMENTA OPHTHALMOLOGICA
2008-09-01
DOI10.1007/s10633-007-9095-4
117期:2页:85-91
收录类别SCI
文章类型Article
WOS标题词Science & Technology
类目[WOS]Ophthalmology
研究领域[WOS]Ophthalmology
关键词[WOS]RESPONSE ACUITY ; CONTRAST ; VEP
英文摘要

Purpose In order to compare the amplitude-spatial frequency (A-SP) regression method with amplitude-logVA (A-logVA) regression methods in extrapolating the sweep pattern visual evoked potential (SPVEP) acuity. Methods We measured SPVEPs in 21 children and three adults using sinusoidally-modulated horizontal gratings as stimuli. The responses were averaged and displayed through discrete Fourier transformations. SPVER acuity was then estimated by using both the SPVEP amplitude- spatial frequency function (A-SP function regression method) and the SPVEP amplitude-log visual-angle function (A-logVA function regression method). Furthermore, the Bailey Lovie logMAR chart was employed to define visual acuity. Curve estimates were calculated to derive a correlation index (R) for each method. Results There are significant differences (t = 2.71, P < 0.05) between the correlation indices of curves obtained using the A-logVA function (logarithmic model, 0.95 +/- 0.01) and that obtained by the A-SP function (inverse model, 0.92 +/- 0.02). The overall correlation coefficient (r) between logMAR acuity and acuity calculated by the A-logVA regression method was 0.32 (P < 0.05). The overall correlation coefficient (r) between logMAR acuity and acuity calculated by the A-SP regression method was 0.41 (P < 0.05). Paired t-tests show that SPVEP acuity from the A-logVA function was not significantly different from acuities of the logMAR function (t = 1.77, P = 0.09). The difference in their mean values is 0.14 +/- 0.08. However, SPVEP acuity calculated using the A-SP function regression method is significantly different from the acuity calculated from the logMAR function (t = 10.09, P < 0.01). The difference in their mean values is 0.41 +/- 0.04. Conclusions The amplitude-logVA function regression method is more accurate in estimating SPVEP acuity in normal subjects with good visual acuity.

语种英语
WOS记录号WOS:000258191200001
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bjmu.edu.cn/handle/400002259/58437
专题北京大学第二临床医学院_眼科
作者单位1.Chaoyang Hosp, Dept Ophthalmol, Beijing 100020, Peoples R China
2.Peking Univ, Dept Ophthalmol, Peoples Hosp, Beijing 100044, Peoples R China
推荐引用方式
GB/T 7714
Zhou, Peng,Zhao, Ming-Wei,Li, Xiao-Xin,et al. A new method of extrapolating the sweep pattern visual evoked potential acuity[J]. DOCUMENTA OPHTHALMOLOGICA,2008,117(2):85-91.
APA Zhou, Peng.,Zhao, Ming-Wei.,Li, Xiao-Xin.,Hu, Xiao-Feng.,Wu, Xi.,...&Xu, Xiu-Lan.(2008).A new method of extrapolating the sweep pattern visual evoked potential acuity.DOCUMENTA OPHTHALMOLOGICA,117(2),85-91.
MLA Zhou, Peng,et al."A new method of extrapolating the sweep pattern visual evoked potential acuity".DOCUMENTA OPHTHALMOLOGICA 117.2(2008):85-91.
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