Before revision: Here we summarize abundant excuses that support the eye detection can be as a noninvasive approach to early diagnose some brain disorders, including Alzheimer disease (AD), autism spectrum disorder (ASD), schizophrenia (SZ)  and major depressive disorder (MDD).
After revision: The present review presents multiple techniques in which ocular assessments may serve as a noninvasive approach to early diagnose some brain disorders, including Alzheimer disease (AD), autism spectrum disorder (ASD), schizophrenia (SZ) and major depressive disorder (MDD).