An electronic unit or device assembly intended to measure, record, and display a range of parameters associated with vision electrophysiology [e.g., electroretinogram (ERG), visual evoked potential (VEP), electrooculogram (EOG)], and/or psychophysical vision (e.g., visual acuity/fields, contrast sensitivity, colour perception), and/or eye movement (e.g., pupillary response, saccades, pursuits, fixations) for vision evaluation/screening; it is not intended to measure dimensional/ocular-shape parameters. Features may include visual stimuli (e.g., patterns of light/images) and/or devices for sensing/tracking (e.g., bioelectric amplifiers, video or infrared cameras).