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.