title: Pupillary constriction to darkness in a patient with blue-cone monochromatism.
abstract: A 17 year old male patient presented with bilateral photophobia, poor color vision, visual acuity 20/80-20/200, nystagmus, and showed normal fundi. Electroretinography revealed evidence of blue-cone monochromatism. This patient showed constriction of the pupils to darkness or the paradoxic pupillary phenomenon.
authors.affiliation: Department of Ophthalmology, University of Iowa Hospitals and Clinics, Iowa City 52241.
authors.forename: W M
authors.initials: WM
authors.lastname: Sobol
authors.forename: A E
authors.initials: AE
authors.lastname: Kimura
authors.forename: R H
authors.initials: RH
authors.lastname: Kardon
authors.forename: H S
authors.initials: HS
authors.lastname: Thompson
mesh_terms: D000293:Adolescent; D003117:Color Vision Defects / Q000175:diagnosis*; D003624:Darkness; D004596:Electroretinography; D006801:Humans; D008297:Male; D015877:Miosis / Q000209:etiology*; D010786:Photoreceptor Cells; D014792:Visual Acuity