Visual impairment Halo vision 2025-05-04T15:27:15Z A visual phenomenon characterized by the perception of bright rings or halos surrounding light sources. Halo vision is often associated with optical irregularities such as corneal edema, cataracts, or intraocular lens complications. It may also occur in conditions affecting the tear film or due to the presence of glare from light scattering within the ocular media.