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Astigmatism analysis after radial keratotomy

D Li1, Z Li, W Lu

  • 1Department of Ophthalmology, Tong-ren Hospital, Beijing.

[Zhonghua Yan Ke Za Zhi] Chinese Journal of Ophthalmology
|May 1, 1995
PubMed
Summary
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Radial keratotomy (RK) surgery can alter post-operative astigmatism. This study found that RK without T-cutting increased astigmatism in 30.2% of eyes, with causes including incision irregularities.

Area of Science:

  • Ophthalmology
  • Refractive Surgery

Background:

  • Radial keratotomy (RK) is a surgical procedure to correct myopia.
  • Astigmatic changes are a known complication of RK.

Purpose of the Study:

  • To evaluate the incidence and magnitude of astigmatic changes after RK without T-cutting.
  • To identify potential causes of induced astigmatism.

Main Methods:

  • Prospective study of 245 eyes from 124 patients undergoing RK without T-cutting.
  • Post-operative follow-up for 6-8 months.
  • Assessment of refractive error and astigmatism.

Main Results:

  • Astigmatism increased in 30.2% of eyes (range +0.50 to +3.50 DC).
  • Astigmatism decreased in 11.0% of eyes.

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  • Astigmatism remained unchanged in 58.8% of eyes.
  • Causes included microperforations, irregular incisions, and variable incision depths.

    • Conclusions:

    • Radial keratotomy without T-cutting can lead to significant post-operative astigmatic changes.
    • Incision characteristics are critical factors influencing refractive outcomes.