title: Visual optics under the wavefront perspective.
abstract: Some intriguing concepts of visual optics cannot be explained by ray tracing. However, they can be clarified using wavefront formalism. Its main advantage is in the use of the concept of vergence, which is very helpful in interpreting the optical phenomena involved in the neutralization of the ametropias. In this line of thinking, the major role of a lens is in the creation of a new light source (the image point) that orientates the refracted waves. Once the nature and position of this source is known, one can easily predict the behavior of the wavefronts. The formalism also allows for an easier understanding on how wavefronts relate to light rays and on how algebraic signs are assigned to optical distances.
authors.affiliation: Departamento de Oftalmologia, Faculdade de Medicina, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
authors.forename: Sidney Júlio
authors.initials: SJ
authors.lastname: Faria-e-Sousa
authors.affiliation: Departamento de Oftalmologia, Faculdade de Medicina, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
authors.forename: Gustavo
authors.initials: G
authors.lastname: Victor
authors.affiliation: Departamento de Oftalmologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
authors.forename: Milton Ruiz
authors.initials: MR
authors.lastname: Alves
mesh_terms: D006801:Humans; D008962:Models, Theoretical; D055095:Optics and Photonics; D012029:Refraction, Ocular / Q000502:physiology*; D012030:Refractive Errors / Q000175:diagnosis*