Visual sense is one of the primitive senses that has been developed evolutionarily. After all, it allows us to perceive the beauty present in our environment and allows us to interact with others. VER (visual evoked response) is the only clinically objective technique available to assess the functional state of the visual system beyond the retinal ganglion cells. Hence it can be used as a panoptic diagnostic tool in the clinical world. This article unravels the relationship between Visual evoked potentials and age, smoking, alcoholism, schizophrenia, refractive errors and glaucoma. Keywords: Visual Evoked Potentials, smoking, alcoholism, schizophrenia, refractive errors, glaucoma.