Changes of cornea in regressive and non-regressive eyes after LASIK for myopia

Qing Pan, Yangshun Gu

Research output: Contribution to journalArticlepeer-review


Objective: To compare the difference of biomechanical changes of cornea between regressive eyes and non-regressive eyes after myopic LASIK, and evaluate the possible roles of these changes on refractive regression following surgery. Methods: Central corneal thickness (CCT) and anterior/posterior corneal curvature radiuses (CCR) were measured in 15 regression eyes and 21 non-regression eyes by scanning slit topography before LASIK and postoperative 1 week, 1 month and 3 months. Results: The CCT was increased with the prolong of follow-up time in both non-regressive eyes and regressive eyes. The posterior CCR was relatively stable, and the anterior CCR at the 3rd month was significantly decreased in comparison with that of week 1 (P=0.002) after LASIK in the regression group. However, in the non-regression group, the postoperative posterior CCR was significantly increased with time, and there was insignificant change in anterior CCR after LASIK. Conclusion: The refractive regression after LASIK is mainly attributed to pan-corneal protrusion rather than central corneal thickening.

Original languageEnglish (US)
Pages (from-to)86-88
Number of pages3
JournalChinese Ophthalmic Research
Issue number1
StatePublished - Feb 2005
Externally publishedYes


  • Cornea
  • Myopia
  • Refractive regression

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience


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