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Original Research

Prospective, randomized, fellow eye comparison of WaveLight® Allegretto Wave® Eye-Q versus VISX CustomVueTM STAR S4 IRTM in photorefractive keratectomy: analysis of visual outcomes and higher-order aberrations

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Pages 1185-1193 | Published online: 22 Aug 2011

Figures & data

Table 1 Preoperative group comparisons

Table 2 One month and 3-month visual acuity comparisons

Table 3 Efficacy, predictability, and safety comparison of Allegretto and VISX laser platforms

Figure 1 Comparison of contrast sensitivity between Allegretto and visx laser platforms at 3, 6, 12, and 18 cycles per degree (cpd) preoperatively (n = 21) and at 3 months postoperatively (n = 21) using the Vectorvision CSV-1000E chart.

Note: *statistically significant (p = 0.013).
Figure 1 Comparison of contrast sensitivity between Allegretto and visx laser platforms at 3, 6, 12, and 18 cycles per degree (cpd) preoperatively (n = 21) and at 3 months postoperatively (n = 21) using the Vectorvision CSV-1000E chart.

Figure 2 Comparison of higher-order aberrations before surgery (n = 20) and 3 months postoperatively (n = 20) in the wavefront optimized platform. Total, coma, Z(3, 1), trefoil, Z(3, 3), and spherical aberration, Z(4, 0) were measured using the Wavescan at a mean diameter of 6 mm. RMS HOA = root-mean-square higher-order aberration

Note: *statistically significant (p = 0.014).
Figure 2 Comparison of higher-order aberrations before surgery (n = 20) and 3 months postoperatively (n = 20) in the wavefront optimized platform. Total, coma, Z(3, 1), trefoil, Z(3, 3), and spherical aberration, Z(4, 0) were measured using the Wavescan at a mean diameter of 6 mm. RMS HOA = root-mean-square higher-order aberration

Figure 3 Comparison of higher-order aberrations before surgery (n = 20) and 3 months postoperatively (n = 20) in the wavefront-guided platform. Total, coma, Z(3, 1), trefoil, Z(3, 3), and spherical aberration, Z(4, 0) were measured using the Wavescan at a mean diameter of 6 mm. (p ≥ 0.126). RMS HOA = root-mean-square higher order aberration.

Note: *statistically significant (p = 0.014).
Figure 3 Comparison of higher-order aberrations before surgery (n = 20) and 3 months postoperatively (n = 20) in the wavefront-guided platform. Total, coma, Z(3, 1), trefoil, Z(3, 3), and spherical aberration, Z(4, 0) were measured using the Wavescan at a mean diameter of 6 mm. (p ≥ 0.126). RMS HOA = root-mean-square higher order aberration.

Figure 4 Preoperative (n = 20) and 3 months postoperative (n = 20) comparison of mean Quality of Life impact of Refractive Correction (QIRC) questionnaire scores (P < 0.001).

Figure 4 Preoperative (n = 20) and 3 months postoperative (n = 20) comparison of mean Quality of Life impact of Refractive Correction (QIRC) questionnaire scores (P < 0.001).