title: [Relationship between best corrected visual acuity and refraction parameters in myopia].
abstract: OBJECTIVE
  To explore the relationship between best corrected visual acuity (BCVA) and refraction parameters in myopia.
  
  
  METHODS
  Two thousand two hundred and seventy-four patients (4245 eyes) with different degrees of myopia were collected. Their BCVA, diopter of spherical (DS), diopter of cylinder (DC), astigmatism axis, axial length (AL) and corneal thickness were detected. The influence of those parameters on BCVA was studied and the mathematical model of the relationship between BCVA and other parameters including the age and gender of patients was established.
  
  
  RESULTS
  The logistic regression analysis showed that there were correlations between the BCVA (y) and DS (x1), DC (x2), gender (x3), AL (x4), corneal thickness (x5), astigmatism axis (x6) and age (x7) (P<0.05): y=0.580 6-0.034 0 x1-0.046 8 x2+0.056 5 x3+0.016 5 x4+ 0.0007 x5+0.000 2 x6-0.005 8 x7.
  
  
  CONCLUSIONS
  For people with myopia, age, gender and corneal thickness have small effect on BCVA, while the DS, DC, AL and astigmatism axis have significant effect on BCVA. The BCVA would decline following the extension of DS, DC and AL. It is helpful to assess the vision of myopia by analyzing the refraction parameters comprehensively.
authors: Eye and ENT Hospital Affiliated to Fudan University, Shanghai 200031, China. lyp.sophia@gmail.com
authors: Ya-ping
authors: YP
authors: Lü
authors: Wen-tao
authors: WT
authors: Xia
authors: Ren-yuan
authors: RY
authors: Chu
authors: Xing-tao
authors: XT
authors: Zhou
authors: Jin-hui
authors: JH
authors: Dai
authors: Hao
authors: H
authors: Zhou