Fractal dimension analysis of binocular miniature eye movement drift components of patients with Alzheimer's disease

Miniature eye movement is characterized by it's complex waveform, small amplitude and unconsciousness. In our previous works, it was suggested that it is highly possible that miniature eye movement is a kind of deterministic chaos. From this view point, the characteristics of miniature eye movements in Alzheimer patients are investigated. The correlation dimension is used as a fractal dimension, validity of sufficient total calculation data (i.e. 18,000 points for 12 fractal dimensions using a bandpass filter), and differences between experimental data and pseudo white noise are confirmed. Alzheimer patient data is also compared with that of healthy control subjects without visual feedback in dark.