Chaotic Analysis of the Electroretinographic Signal for Diagnosis

Table 1

Nonlinear parameter values in different cases for 30 Hz flicker ERG signal.

Parameters	Controls	CSNB I	CSNB II	Typical RP	Early onset RP	Late stage RP	𝑃 value
HE	0.5468 ± 0.042	0.3467 ± 0.04	0.2513 ± 0.0214	0.7768 ± 0.012	0.6987 ± 0.0314	0.9144 ± 0.0654	0.0051
ApEn	2.9527 ± 0.0301	2.6553 ± 0.0425	2.4934 ± 0.028	1.9464 ± 0.01	1.2970 ± 0.006	1.0904 ± 0.043	0.0124
HFD	1.8483 ± 0.0401	1.6526 ± 0.0912	1.4366 ± 0.0048	1.3370 ± 0.03	1.2464 ± 0.0062	1.0809 ± 0.012	0.123
LLE	0.4823 ± 0.0031	0.457 ± 0.001	0.41 ± 0.004	0.43 ± 0.0015	0.401 ± 0.007	0.422 ± 0.0017	0.067