Visual Acuity Enhancement
Visual acuity enhancement is the increase in sharpness and clarity of vision. As a result, the external environment's visual features are sharpened to the point that object edges are seen as being exceptionally focused, distinct, and defined. Acuity enhancement is comparable to sharpening a projector or camera lens that was a little out of focus. At its greatest degree, a person may notice an improvement in their capacity to simultaneously monitor and interpret both their central and peripheral vision. In contrast, in the standard sober state, a person can only perceive in detail the limited area of their central vision.
The effect is often accompanied by other coinciding effects such as colour enhancement and increased apophenia. It is most commonly induced under the influence of mild dosages of psychedelic compounds, such as LSD, psilocybin, and mescaline. However, it can also occur to a lesser extent under the influence of certain stimulants, nootropics, and dissociatives, such as MDMA, piracetam, aniracetam, or 3-MeO-PCP.