![Document](https://dev.macplc.com/wp-content/uploads/2017/03/Document.jpg)
Introduction
Eye tracking provides a convenient and promising biological marker of cognitive impairment in patients with neurodegenerative disease. Here we report a longitudinal study of saccadic eye movements in a sample of patients with Alzheimer’s disease and elderly control participants who were assessed at the start of the study and followed up 12-months later.