title: Third-order aberration theory for weak gradient-index lenses.
abstract: A set of simple analytic expressions has been developed for calculating the third-order aberration coefficients in weak or nearly thin axial and radial gradient-index lenses.
authors.forename: D Y
authors.initials: DY
authors.lastname: Wang
authors.forename: D T
authors.initials: DT
authors.lastname: Moore