title: Normal vernier acuity in infants with delayed visual maturation.
abstract: OBJECTIVE
  Measures of vernier acuity may correlate accurately with measures of Snellen acuity. We used the sweep visual evoked potential to determine whether vernier acuity is normal in children with delayed visual maturation (DVM).
  
  
  METHODS
  Case series of two infants.
  
  
  METHODS
  Thresholds for grating and vernier acuity were measured electrophysiologically in two infants with DVM using the sweep visual evoked potential. Acuity thresholds were calculated for each of these visual functions.
  
  
  RESULTS
  Two infants with DVM had normal thresholds for grating and vernier acuity, even though their visual behavior as determined clinically was abnormal.
  
  
  CONCLUSIONS
  Some children with DVM have normal acuity thresholds, even though the behaviors associated with vision are delayed or absent.
authors.affiliation: Smith-Kettlewell Eye Research Institute, 2318 Fillmore Street, San Francisco, CA 94115, USA. Good@SKI.org
authors.forename: William V
authors.initials: WV
authors.lastname: Good
authors.forename: Chuan
authors.initials: C
authors.lastname: Hou
mesh_terms: D002658:Developmental Disabilities / Q000503:physiopathology*; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D014786:Vision Disorders / Q000503:physiopathology*; D014792:Visual Acuity / Q000502:physiology*