title: The determination of the central static visual acuity, presentation of a modified Landolt C chart.
abstract: The circumstances which can influence the determination of the static central visual acuity are enumerated. The TNO Landolt C chart can be improved. A modified Landolt C letter chart is introduced on which the optotype is presented in 8 different positions, in vertical rows of ten per visual step above visual acuity 0.3.
authors.forename: G H
authors.initials: GH
authors.lastname: Jonkers
authors.forename: J
authors.initials: J
authors.lastname: Burger
mesh_terms: D006801:Humans; D014787:Vision Tests / Q000379:methods*; D014792:Visual Acuity / Q000502:physiology*