Comparison of four corneal pachymetry technique;s in corneal refractive surgery.

作者: Jaime Javaloy , Maria Teresa Vidal , Jorge L Alió , Jose R Villada , Alberto Artola

DOI: 10.3928/1081-597X-20040101-06

关键词:

摘要: Purpose To assess the effectiveness of optical and ultrasonic pachymetry when examining corneas patients before after laser in situ keratomileusis (LASIK). Methods We conducted a prospective study 25 (50 eyes) who had LASIK for myopia or myopic astigmatism (mean spherical equivalent refraction -4.80 +/- 3.60 D; range -1.75 to -12.00 D). Corneal thickness was measured using 1) conventional (20 MHz probe) central cornea, 2) ASL confocal microscopy (CMTF analysis), 3) Orbscan II Analyzer, 4) ultrasound biomicroscopy (UBM) preoperatively 3 months postoperatively. Results Preoperative values with Analyzer (551.3 27.3 microm) were almost identical those 20 probe (553.7 25.7 microm; t-test P = .652). The mean preoperative UBM 566.7 38.8 microm CMTF 553.2 15.5 microm. optic system measurements differed operated eyes; yielded an average 478.7 23.5 UBM, 482.4 40.3 These from (Tukey test; .023) measurement 461.1 37.5 but not 475.2 41.8 registered greater that more variable than obtained pachymetry. Conclusions In non-operated eyes, corneal similar ultrasound, II, techniques, giving thicker readings.

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