| Objective: To investigate the related factor analysis of corneal asphericity（Q-value）. Methods: Corneal topography and wavefront data were collected from 179 myopic eyes .The Q-value was computed from corneal Shape Factor (SF), and wavefront data was computed for a 6.0-mm pupil.
Results: The relationship between Q-value and Spherical aberration(C12) was statistically significant (r=0.362，p=0.000). This was also the case for the relationship between Q-value and corneal astigmatism(r=-0.185，p=0.013). In addition, no association could be demonstrated between Q-value and RMS HO(r=-0.132，p=0.078) or C7(r=-0.122，p=0.135)or C8（r=-0.133，p=0.076）,and there was no relationship between Q-value and corneal SimK-value (r = 0.029, p = 0.696).
Conclusion: Spherical aberration and the value of corneal astigmatism are the most importantly related factor of Q-value . |
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