Glare.

The article presents information on the classification and causes of glare. Glare is produced by optical imperfections in the refractive media of the eye which consist of the tear film, the corneal epithelium, the corneal stroma, the corneal endothelium, the aqueous, the anterior lens capsule, the lens substance, the posterior lens capsule and the vitreous. The halo is a ring of light emanating from a point light source with a dark circle immediately surrounding the light and then a bright ring, as in the halo depicted in a religious icon.