Multifractal characterization of nystagmus eye movements

被引:0
作者
Meo, M. M. [1 ]
Pavon, I. Sanchez [2 ,3 ]
Duarte, C. D. [1 ]
Del Punta, J. A. [1 ,4 ]
Herranz, R. Martin [2 ,3 ]
Gasaneo, G. [1 ,5 ]
机构
[1] Univ Nacl Sur UNS, Dept Fis, Inst Fis Sur, CONICET, RA-8000 Bahia Blanca, Argentina
[2] Univ Valladolid, IOBA Eye Inst, Sch Optometry, Optometry Res Grp, Valladolid 47011, Spain
[3] Univ Valladolid, Dept Fis Teor Atom & Opt, Valladolid 47011, Spain
[4] Univ Nacl Sur UNS, Dept Matemat, RA-8000 Bahia Blanca, Argentina
[5] Ctr Integral Neuricencias Aplicadas, RA-8000 Bahia Blanca, Argentina
关键词
DETRENDED FLUCTUATION ANALYSIS; TRACKING; COMPLEXITY;
D O I
10.1063/5.0194768
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
In this work, we investigate the multifractal properties of eye movement dynamics of children with infantile nystagmus, particularly the fluctuations of its velocity. The eye movements of three children and one adult with infantile nystagmus were evaluated in a simple task in comparison with 28 children with no ocular pathologies. Four indices emerge from the analysis: the classical Hurst exponent, the singularity strength corresponding to the maximum of the singularity spectrum, the asymmetry of the singularity spectrum, and the multifractal strength, each of which characterizes a particular aspect of eye movement dynamics. Our findings indicate that, when compared to children with no ocular pathologies, patients with infantile nystagmus present lower values of all indices. Except for the multifractal strength, the difference in the remaining indices is statistically significant. To test whether the characterization of patients with infantile nystagmus in terms of multifractality indices allows them to be distinguished from children without ocular pathologies, we performed an unsupervised clustering analysis and classified the subjects using supervised clustering techniques. The results indicate that these indices do, indeed, distinctively characterize the eye movements of patients with infantile nystagmus.
引用
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页数:12
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