Journal of refractive surgery (Thorofare, N.J. : 1995) · 2003
Laser in situ keratomileusis with Alcon CustomCornea.
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Lawless Michael A, Hodge Christopher, Rogers Christopher M, Sutton Gerard L
Аннотация
PURPOSE: To report the 3-month results of our first cases of laser in situ keratomileusis (LASIK) with Alcon's CustomCornea.
METHODS: Wavefront analysis was performed using the LADARWave aberrometer and ablation was performed with the LADARVision4000 system. Thirty-one eyes of 17 patients were analyzed prospectively, at 1 and 3 months after CustomCornea surgery. Psychophysical tests were performed, including high and low contrast acuity, and contrast sensitivity under scotopic and photopic conditions. In addition, psychometric testing was performed using a subjective vision questionnaire.
RESULTS: Mean spherical equivalent refraction improved from a baseline -3.05 +/- 1.92 D to +0.02 +/- 0.28 D at 3 months (28 eyes). At 3 months, 46.4% (13 eyes) had uncorrected visual acuity of 20/16, 92.7% (26 eyes) had 20/20, and 100% (28 eyes) had 20/25 uncorrected visual acuity. Three months after CustomCornea surgery, there was a statistically significant improvement in contrast sensitivity under both scotopic and photopic conditions, and a statistically significant increase in third and fourth order aberrations. There was a statistically significant improvement in visual quality as measured by the subjective vision index, increasing from a preoperative mean 66.62 to 87.63 at 3 months after surgery.
CONCLUSIONS: CustomCornea was an improvement over conventional LASIK as measured by most psychophysical and psychometric parameters. The relationship between higher order aberrations and other psychophysical and psychometric measurements needs more analysis.
METHODS: Wavefront analysis was performed using the LADARWave aberrometer and ablation was performed with the LADARVision4000 system. Thirty-one eyes of 17 patients were analyzed prospectively, at 1 and 3 months after CustomCornea surgery. Psychophysical tests were performed, including high and low contrast acuity, and contrast sensitivity under scotopic and photopic conditions. In addition, psychometric testing was performed using a subjective vision questionnaire.
RESULTS: Mean spherical equivalent refraction improved from a baseline -3.05 +/- 1.92 D to +0.02 +/- 0.28 D at 3 months (28 eyes). At 3 months, 46.4% (13 eyes) had uncorrected visual acuity of 20/16, 92.7% (26 eyes) had 20/20, and 100% (28 eyes) had 20/25 uncorrected visual acuity. Three months after CustomCornea surgery, there was a statistically significant improvement in contrast sensitivity under both scotopic and photopic conditions, and a statistically significant increase in third and fourth order aberrations. There was a statistically significant improvement in visual quality as measured by the subjective vision index, increasing from a preoperative mean 66.62 to 87.63 at 3 months after surgery.
CONCLUSIONS: CustomCornea was an improvement over conventional LASIK as measured by most psychophysical and psychometric parameters. The relationship between higher order aberrations and other psychophysical and psychometric measurements needs more analysis.