title: [The contrast study of preoperative flash visual evoked potential test and the postoperative resumed visual acuity in senile cataract patients].
abstract: OBJECTIVE
  To study the using value of flash visual evoked potentials (FVEP) in predicting the resumed visual acuities in senile cataract patients.
  
  
  METHODS
  Forty-three eyes with senile cataract had been conducted extracapsular cataract extraction combined with posterior chamber intraocular lens implantation. The contrast study had been carried out in this research between preoperative FVEP, light projection and color discrimination tests with the postoperative regained visual acuities.
  
  
  RESULTS
  There were significant correlations between the regained visual acuities and the amplitudes of FVEP (X1), the latencies of P1 wave (X2) as well as color discriminations (P < 0.01). The coefficients were 0.7277, -0.5678 and 0.4302 in sequence. There was no correlation between the resumed visual acuities and the light projection test before operation. The formula of linear regression between the visual acuities (Y) and the indexes of FVEP was Y = 0.2255 +0.047X1 -0.0026X2.
  
  
  CONCLUSIONS
  FVEP is an effective method to evaluate the visual function before the cataract operation. It may predict the resumed visual acuity.
authors.affiliation: Zhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou 510060, China.
authors.forename: G
authors.initials: G
authors.lastname: Luo
authors.forename: Q
authors.initials: Q
authors.lastname: Hu
authors.forename: X
authors.initials: X
authors.lastname: Su
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000503:physiopathology*; D002387:Cataract Extraction; D015350:Contrast Sensitivity; D005074:Evoked Potentials, Visual; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D008266:Macula Lutea / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D016896:Treatment Outcome; D014792:Visual Acuity