title: [The transient PVEP acuity assessment for 2 to 5 years old normal children].
abstract: OBJECTIVE
  To evaluate the practicality of transient PVEP (pattern visual evoked potential, PVEP) acuity assessment for 2 to 5 years old normal children from September 2007 to January 2008.
  
  
  METHODS
  Pattern acuity and transient PVEP-A of 179 (355 eyes) normal children between 2 to 5 years were detected and analyzed. Pattern acuity data were got from test for single uncorrected eye with pattern acuity table. PVEP-A was measured by the horizontal gratings evoked potential, voyich were cognizable response. chi2 and rank tests methods were used to analysis. The value of PVEP-A was converted to international standard acuity, and then comparison to pattern acuity with Logistic regression method.
  
  
  RESULTS
  With the growth of age, pattern acuity was gradually increased and the value was greater than 0.4. The positive correlation also existed among PVEP-A and age, PVEP-A from test children was all greater than 3.4 c/d. The analysis result of rank regression was P<0.01, that weaned PVEP-A difference among four groups had statistics significance. The correlation coefficient of PVEP-A with pattern acuity was good (r=0.673). The difference of PVEP-A and pattern acuity between two eyes was correlated(r = 0.664). The result also pointed out PVEP-A growth was earlier than pattern acuity among 179 children.
  
  
  CONCLUSIONS
  Stabilization and reliability PVEP is a good objective visual assessment for younger and handicapped children.
authors.affiliation: Department of Pediatric Ophthalmology, Peking University First Hospital, Beijing 100034, China.
authors.forename: Yun-wei
authors.initials: YW
authors.lastname: Fan
authors.forename: Xiao-qing
authors.initials: XQ
authors.lastname: Li
authors.forename: Xiao-ming
authors.initials: XM
authors.lastname: Yan
mesh_terms: D002675:Child, Preschool; D004596:Electroretinography; D005074:Evoked Potentials, Visual; D005260:Female; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual; D014792:Visual Acuity