Clinical Research Directory

The following are the inclusion/exclusion criteria for epilepsy patients with thalamic electrodes age 13 years and up (Aim 1): Inclusion Criteria: * normal vision with or without the use of corrective lenses Exclusion Criteria: * severe vision impairment even with correction preventing ability to see stimuli (prevents accurate pupil and eye gaze measurements) * unable to perform the perception task due to cognitive impairment. All participants must be capable of consenting for themselves. The following are the inclusion/exclusion criteria for epilepsy patients with thalamic electrodes age 18 years and up (Aim 2): Inclusion Criteria: * normal vision with or without the use of corrective lenses * a female subject must have a negative pregnancy test and if sexually active, must be using a reliable form of birth control for the duration of the trial, be surgically sterile, or be at least two years post-menopausal. Exclusion Criteria: * severe vision impairment even with correction preventing ability to see stimuli (prevents accurate pupil and eye gaze measurements) * unable to perform the perception task due to cognitive impairment. All participants must be capable of consenting for themselves. * pregnancy