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Related Experiment Videos

Visual field changes after laser in situ keratomileusis.

Sandra M Brown1, Jay C Bradley, Ke Tom Xu

  • 1Department of Ophthalmology and Visual Sciences, Texas Tech University Health Sciences Center, Lubbock, Texas, USA. sbrownmd@carolina.rr.com

Journal of Cataract and Refractive Surgery
|May 19, 2005
PubMed
Summary

Laser in situ keratomileusis (LASIK) surgery may decrease midperipheral visual field sensitivity. This study found a statistically significant decline in sensitivity between 15 and 30 degrees after LASIK for myopia.

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Area of Science:

  • Ophthalmology
  • Refractive Surgery
  • Visual Field Testing

Background:

  • Laser in situ keratomileusis (LASIK) is a common refractive surgery procedure.
  • Understanding the impact of LASIK on visual function is crucial for patient outcomes.

Purpose of the Study:

  • To investigate the effect of LASIK on the central 30-degree visual field.
  • To assess changes in visual field sensitivity following myopic LASIK.

Main Methods:

  • A nonrandomized clinical trial involving 14 patients (27 eyes) undergoing LASIK.
  • Automated static perimetry (Octopus 1-2-3, Dynamic-32) was performed preoperatively and 6 months postoperatively.
  • Multivariate analysis examined the relationship between visual field changes and clinical parameters.

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Main Results:

  • No significant change in mean sensitivity (MS) was observed in the central 15-degree visual field.
  • A statistically significant decrease in MS (-0.82 dB) was found in the 15- to 30-degree visual field (P=.01).
  • Decreased sensitivity correlated positively with refractive error and corneal thickness, and negatively with optical zone diameter.

Conclusions:

  • Automated static perimetry can detect reduced midperipheral visual field sensitivity after myopic LASIK.
  • This method may help quantify the visual effects of surgical technique improvements.