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A) Location of the vertex normal from to the pupil center for preoperative and postoperative measures. Black triangles describe the mean and the ellipse around the triangles the standard deviation. B) Location of the intraocular lens (IOL) center to the vertex normal. Black circle describes the mean and the ellipse around the circle the standard deviation. Each ring on the plot describes a 0.2 mm step. Locations are nasal for 0 • , superior for 90 • , temporal for 180 • and inferior for 270 • .

A) Location of the vertex normal from to the pupil center for preoperative and postoperative measures. Black triangles describe the mean and the ellipse around the triangles the standard deviation. B) Location of the intraocular lens (IOL) center to the vertex normal. Black circle describes the mean and the ellipse around the circle the standard deviation. Each ring on the plot describes a 0.2 mm step. Locations are nasal for 0 • , superior for 90 • , temporal for 180 • and inferior for 270 • .

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Purpose: To assess the impact of ocular biometric variables on the visual performance achieved with a low addition trifocal intraocular lens (MIOL). Methods: Retrospective observational study including 34 eyes. Preoperative measured variables included mean corneal power (Km), corneal regular astigmatism (RA), anterior chamber depth (ACD), axial...

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... agreement with preoperative values was evaluated for variables correlated with AUCs (Table 4). No significant differences were found between variables measured preoperatively and postoperatively, except for the chord that was significantly reduced after surgery (Fig. 3A). Table 1 Groups with total area under the curve of visual acuity higher and lower to ...
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... ( (Fig. ...

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... Correlation analysis between angle kappa and visual acuity or contrast sensitivity defocus curve AUCs could not confirm any interaction either (data not shown). Our findings agree with those previously reported by Velasco-Barona et al. [2], and those published by Fernández et al.-namely, the kappa angle or chord mu did not have any relationship with AUCs [18]. This suggests that preoperative angle kappa may not be appropriate to predict future visual outcomes. ...
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... Procedures to measure variables such as MIOL decentration, chord-mu, and others have been detailed in previous studies. 11,13,14 Statistical analysis Normality of data distributions from variables included in the study was tested with Shapiro-Wilk test. Agreement between postoperative pupil diameters was evaluated by means of computing mean differences and the limits of agreement (LoAs). ...
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Purpose: To identify the most sensitive visual performance metric for evaluating the pupil-dependency of a multifocal intraocular lens (MIOL) and to determine the pupil measurement method most correlated with such metric. Methods: Twenty-seven right eyes implanted with a MIOL were included in the analysis. Three pupil size measurements were obtained preoperatively and at 1 month after surgery with the Keratograph 5M system: photopic (PP), mesopic (MP), and the average from both (AP). Pupil was also measured with a rule (RP) under the same light conditions of postoperative visual performance measurements that included, corrected visual acuities (VA) at three distances (far, 67 cm and 40 cm), visual acuity (VADC) and contrast sensitivity defocus curves for optotype sizes of 0.3 logMAR (CSDC3) and 0.7 logMAR (CSDC7). Differences in visual performance were also analyzed for eyes with RP > 3 mm (Group A) and RP ⩽ 3 mm (Group B). Results: PP diameter decreased after surgery by 16% (p = 0.001), whereas MP (p = 0.013) and AP (p = 0.008) decreased by 10%. The best agreement with RP was obtained for AP. Group B showed a trend to better performance than Group A for all the included metrics (p > 0.05). From the three types of defocus curves, CSDC3 obtained generally highest statistical power for testing differences between groups. The strongest statistically significant correlations between pupil size and CSDC3 were obtained for RP and AP. Conclusion: The CSDC3 was the most sensitive metric to detect MIOL pupil-dependency. PR and AP were more correlated with CSDC3 than PP and MP.
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Purpose: To compare the clinical outcomes obtained after implantation of 1 of 3 models of trifocal diffractive intraocular lenses (IOLs). Setting: Hospital da Luz, Lisbon, Portugal. Design: Prospective randomized comparative study. Methods: Ninety eyes of 45 patients undergoing cataract surgery with bilateral implantation of 1 of 3 models of trifocal diffractive IOLs were enrolled. The IOL models implanted were the FineVision POD F, RayOne Trifocal, or the Acrysof IQ PanOptix (30 eyes of 15 patients in each group). Visual acuity (VA), refraction, defocus curve, and contrast sensitivity outcomes were evaluated during a 3-month follow-up. Furthermore, the quality-of-vision (QoV) questionnaire (McAlinden et al.) was used to evaluate the frequency, severity, and discomfort of different visual symptoms. Results: No statistically significant differences were found between groups in distance, intermediate, and near VA (p≥0.112) and postoperative refraction (p≥0.059). Postoperative binocular uncorrected intermediate VA of 0.10 logMAR or better was found in 14 (93.33%) patients in the 3 groups. Postoperative binocular uncorrected near VA of 0.10 logMAR or better was found in 13 (86.67%), 14 (93.33%) and 13 (86.67%) patients in the PODF, RayOne, and PanOptix groups, respectively. No statistically significant differences were found between groups in scotopic contrast sensitivity with and without glare as well as in the QoV scores (p≥0.057), except for the difference between the PODF and RayOne groups in depth perception severity, which was less in the RayOne group (p=0.019). Conclusions: The 3 trifocal IOLs evaluated provided a complete visual restoration with good visual quality outcomes.