Comparison of the effects of cylindrical correction with and without iris recognition technology in wavefront laser-assisted in situ keratomileusis

作者：Wang Tsung Jen; Lin Yu Huang; Chang David C K; Chou Hsiu Chu; Wang I Jong^*

来源：Clinical and Experimental Ophthalmology, 2012, 40(3): 239-246.

DOI：10.1111/j.1442-9071.2011.02614.x

• cylindrical correction
• iris recognition
• LASIK
• vector analysis
• wavefront

Background: To analyse the magnitude of cylindrical corrections over which cyclotorsion compensation with iris recognition (IR) technology is beneficial during wavefront laser-assisted in situ keratomileusis. %26lt;br%26gt;Design: A retrospectively comparative case series. %26lt;br%26gt;Participants or Samples: Fifty-four eyes that underwent wavefront laser-assisted in situ keratomileusis without IR (non-IR group) and 53 eyes that underwent wavefront laser-assisted in situ keratomileusis with IR (IR group) were recruited. %26lt;br%26gt;Methods: Subgroup analysis based on baseline astigmatism were: a low degree of astigmatism (%26gt;= 1.00 D to %26lt;2.00 D), a moderate degree of astigmatism (%26gt;= 2.00 D to %26lt;3.00 D) and a high degree of astigmatism (%26gt;= 3.00 D). %26lt;br%26gt;Main Outcome Measures: Vector and non-vector analyses were used for comparison. %26lt;br%26gt;Results: The mean cylinder was -1.89 +/- 0.76 D in the non-IR group and -2.00 +/- 0.77 D in the IR group. Postoperatively, 38 eyes (74.50%) in the IR group and 31 eyes (57.50%) in the non-IR group were within +/- 0.50 D of the target induced astigmatism vector (P = 0.063). The difference vector was 0.49 +/- 0.28 in the IR group and 0.63 +/- 0.40 in the non-IR group (P = 0.031). In the analysis of subgroups, the magnitude of error was significantly lower in the moderate IR subgroup than that of the moderate non-IR subgroup (P = 0.034). Furthermore, the moderate IR subgroup had a lower mean difference vector (P = 0.0078) and a greater surgically induced astigmatism (P = 0.036) than those of the moderate non-IR group. %26lt;br%26gt;Conclusions: Wavefront laser-assisted in situ keratomileusis for the treatment of astigmatism using IR technology was effective and accurate for the treatment of myopic astigmatism.

• 出版日期2012-4