Eye movements - an early marker of cognitive dysfunctions

Cognitive impairments or dysfunctions are one of the major issues of aging population and medical conditions like brain damage, stroke etc. Assessment of cognitive functioning is usually done by medical practitioners using various standard psychological tests which require expert interventions. In the present study we have tried to use eye tracking as a possible option for assessment of cognitive functions while executing a digitized digit symbol substitution task. The standard task has been modified so that more detail insights of one's cognitive state can be obtained without any manual intervention. Results show that it is possible to get more information like attention, perception etc. It also gives insight about the performance of an individual and can be used for analyzing the executive functions like processing speed, memory etc.