Paradoxical pupil in congenital achromatopsia

Int Ophthalmol. 1981 Mar;3(2):91-6. doi: 10.1007/BF00133420.


Children with congenital achromatopsia possess an interesting paradoxical pupillary constriction to darkness that has not been previously described. This paper describes three children in whom this paradoxical pupillary reaction was documented with infrared pupillometry. The literature on the pupil in achromatopsia is reviewed and a tentative testable model of the reaction is hypothesized.

Publication types

  • Case Reports
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Child
  • Child, Preschool
  • Color Vision Defects / complications
  • Color Vision Defects / congenital*
  • Color Vision Defects / physiopathology
  • Dark Adaptation*
  • Female
  • Humans
  • Male
  • Nystagmus, Pathologic / complications
  • Photic Stimulation
  • Pupil / physiology*
  • Visual Acuity