Surgically-induced astigmatism after laser in situ keratomileusis for spherical myopia

D. Huang, S. Sur, F. Seffo, D. M. Meisler, R. R. Krueger

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24 Scopus citations

Abstract

PURPOSE: To characterize the surgically-induced-astigmatism (SIA) associated with spherical LASIK. METHODS: Refractive outcomes in 70 eyes that underwent primary myopic LASIK with purely spherical ablation were analyzed. The Summit Apex Plus excimer laser was used. The Bausch and Lomb Hansatome with the 180-μm plate was used to produce superiorly hinged flaps. The relationship between refractive astigmatism and corneal topographic astigmatism was analyzed using linear regression and vector analysis. RESULTS: There was a statistically significant negative correlation (slope = -0.21) between refractive surgically-induced astigmatism and preoperative topographic cylinder. A 0.24-D with-the-rule shift was also found. Surgically-induced astigmatism was not correlated with the magnitude of laser ablation. CONCLUSION: The lamellar keratotomy portion of LASIK reduces pre-existing corneal astigmatism and produces a relative steepening of the hinge meridian.

Original languageEnglish (US)
Pages (from-to)515-518
Number of pages4
JournalJournal of Refractive Surgery
Volume16
Issue number5
StatePublished - Jan 1 2000

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ASJC Scopus subject areas

  • Surgery
  • Ophthalmology

Cite this

Huang, D., Sur, S., Seffo, F., Meisler, D. M., & Krueger, R. R. (2000). Surgically-induced astigmatism after laser in situ keratomileusis for spherical myopia. Journal of Refractive Surgery, 16(5), 515-518.