scholarly journals Objective optical quality and visual outcomes after the PresbyMAX monocular ablation profile

2020 ◽  
Vol 13 (7) ◽  
pp. 1060-1065
Author(s):  
Dan Fu
Keyword(s):  
Optical Quality ◽  
Visual Outcomes ◽  
Ablation Profile

scholarly journals Comparison of corneal optical quality after SMILE, wavefront-optimized LASIK and topography-guided LASIK for myopia and myopic astigmatism

2021 ◽  
Author(s):  
Yu Zhang ◽  
Xiaoxiao Sun ◽  
Yueguo Chen
Keyword(s):  
Visual Acuity ◽  
Optical Path Difference ◽  
Path Difference ◽  
Mean Value ◽  
Optical Quality ◽  
Distance Visual Acuity ◽  
Visual Outcomes ◽  
Corneal Aberrations ◽  
Uncorrected Distance Visual Acuity ◽  
Significant Difference

Abstract Purpose: To compare visual outcomes and corneal optical quality after small incision lenticule extraction (SMILE) , wavefront-optimized (WFO) FS-LASIK and topography-guided customized ablation treat­ment (TCAT) FS-LASIK for myopia. Methods: This prospective study included 283 eyes of 283 myopic patients who underwent SMILE or FS-LASIK according to the patient's wishes. FS-LASIK patients were randomly assigned to use WFO or TCAT ablation. There were 102 eyes, 100 eyes and 81eyes in the SMILE group, WFO group and TCAT group, respectively. The combined corneal topographer and tomographer system (Sirius) was used to measure corneal aberrations and optical quality. Visual outcomes and corneal aberrations were compared among the three groups.Results: At postoperative 1 and 6 months, there were no significant differences in uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA) among the three groups (P > .05). Postoperative manifest refractive spherical equivalent was similar among the groups (P > .05). There was statisti­cally significant difference in cylinder at 1 month among the three groups, with the highest mean value in TCAT group (P < .05). The corneal optical path difference (OPD), root mean square of corneal astigmatism and strehl ratio (SR) were the most superior in the TCAT group at postoperative 1 and 6 months (P < .05).Conclusion: SMILE, WFO FS-LASIK and TCAT FS-LASIK provided similar visual results. TCAT FS-LASIK could induce fewer corneal OPD and astigmatism, and higher SR than the others. However, a better algorithm for TCAT FS-LASIK is needed to decrease postoperative residual astigmatism.

scholarly journals Visual outcomes and optical quality after implantation of a diffractive multifocal toric intraocular lens

2016 ◽  
Vol 64 (4) ◽  
pp. 285 ◽  
Author(s):  
Yan Lu ◽  
Zhenping Huang ◽  
Xiangfei Chen ◽  
Ming Zhao ◽  
Yuhua Shi ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
Optical Quality ◽  
Toric Intraocular Lens ◽  
Visual Outcomes

scholarly journals Comparative Analysis of Visual Performance and Astigmatism Tolerance with Monofocal, Bifocal, and Extended Depth-of-Focus Intraocular Lenses Targeting Slight Myopia

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Jie Xu ◽  
Tianyu Zheng ◽  
Yi Lu
Keyword(s):  
Contrast Sensitivity ◽  
Significant Negative Correlation ◽  
Optical Quality ◽  
Corneal Astigmatism ◽  
Intraocular Lenses ◽  
Visual Performance ◽  
Depth Of Focus ◽  
Visual Outcomes ◽  
Extended Depth Of Focus ◽  
Visual Function Questionnaire

Purpose. To compare the visual performance and astigmatism tolerance of 3 intraocular lens (IOL) groups: monofocal, bifocal, and extended depth-of-focus (EDOF) IOLs targeting slight myopia. Methods. Overall, there were 60 cataract surgery eyes from 60 patients with implantation of a monofocal, bifocal, or EDOF IOL (20 eyes in each IOL group). The EDOF IOLs targeted slight myopia (−0.25 D to −0.75 D). Intragroup comparison of visual acuity, defocus curve, objective optical quality, contrast sensitivity, visual function questionnaire scores, patients’ overall satisfaction, and the astigmatism tolerance was performed 3 months after surgery. Results. The EDOF group provided equivalently excellent distance visual outcomes (0.06 ± 0.12) as the monofocal (0.06 ± 0.09) and bifocal (0.03 ± 0.09) groups P = 0.554 , better intermediate vision than the other 2 groups P < 0.05 , and similarly satisfactory near visual outcomes (0.23 ± 0.16 at 20 cm, and 0.17 ± 0.14 at 33 cm) as the bifocal group (0.28 ± 0.14 at 20 cm and 0.08 ± 0.10 at 33 cm) P > 0.05 . The contrast sensitivity of EDOF IOL was slightly decreased compared to that of monofocal IOL, but it was better than that of bifocal IOL. The EDOF group showed significantly higher satisfaction than the bifocal group did when preoperative corneal astigmatism was 0.75 D or greater P = 0.009 . A significant negative correlation between the corneal astigmatism and patient satisfaction was observed in only the bifocal group. Conclusions. The EDOF IOLs targeting slight myopia offered satisfactory visual outcomes at an extended range from far to near distances. The EDOF and monofocal IOLs showed a better tolerance to astigmatism than did the bifocal IOL.

Optical Quality and Visual Discrimination Capacity After Myopic LASIK With a Standard and Aspheric Ablation Profile

2011 ◽  
Vol 27 (8) ◽  
pp. 597-601 ◽  
Author(s):  
Rosario G. Anera ◽  
José J. Castro ◽  
José R. Jiménez ◽  
César Villa ◽  
Aixa Alarcón
Keyword(s):  
Visual Discrimination ◽  
Optical Quality ◽  
Ablation Profile ◽  
Discrimination Capacity

scholarly journals Wavefront-Guided Photorefractive Keratectomy with the Use of a New Hartmann-Shack Aberrometer in Patients with Myopia and Compound Myopic Astigmatism

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Steven C. Schallhorn ◽  
Jan A. Venter ◽  
Stephen J. Hannan ◽  
Keith A. Hettinger
Keyword(s):  
Patient Satisfaction ◽  
Photorefractive Keratectomy ◽  
Santa Ana ◽  
Visual Outcomes ◽  
Uncorrected Distance Visual Acuity ◽  
High Predictability ◽  
Ablation Profile ◽  
The Mean ◽  
New Generation ◽  
Myopic Astigmatism

Purpose. To assess refractive and visual outcomes and patient satisfaction of wavefront-guided photorefractive keratectomy (PRK) in eyes with myopia and compound myopic astigmatism, with the ablation profile derived from a new Hartmann-Shack aberrometer.Methods. In this retrospective study, 662 eyes that underwent wavefront-guided PRK with a treatment profile derived from a new generation Hartmann-Shack aberrometer (iDesign aberrometer, Abbott Medical Optics, Inc., Santa Ana, CA) were analyzed. The preoperative manifest sphere ranged from −0.25 to −10.75 D, and preoperative manifest cylinder was between 0.00 and −5.25 D. Refractive and visual outcomes, vector analysis of the change in refractive cylinder, and patient satisfaction were evaluated.Results. At 3 months, 91.1% of eyes had manifest spherical equivalent within 0.50 D. The percentage of eyes achieving uncorrected distance visual acuity 20/20 or better was 89.4% monocularly and 96.5% binocularly. The mean correction ratio of refractive cylinder was 1.02 ± 0.43, and the mean error of angle was 0.00 ± 14.86° at 3 months postoperatively. Self-reported scores for optical side effects, such as starburst, glare, halo, ghosting, and double vision, were low.Conclusion. The use of a new Hartmann-Shack aberrometer for wavefront-guided photorefractive keratectomy resulted in high predictability, efficacy, and patient satisfaction.

scholarly journals Comparative analysis of visual performance and astigmatism tolerance with monofocal, bifocal, and extended depth-of-focus intraocular lenses targeting slight myopia

2019 ◽  
Author(s):  
Jie Xu ◽  
Tianyu Zheng ◽  
Yi Lu
Keyword(s):  
Contrast Sensitivity ◽  
Significant Negative Correlation ◽  
Optical Quality ◽  
Corneal Astigmatism ◽  
Intraocular Lenses ◽  
Visual Performance ◽  
Depth Of Focus ◽  
Visual Outcomes ◽  
Extended Depth Of Focus ◽  
Visual Function Questionnaire

Abstract BackgroundTo compare the visual performance and astigmatism tolerance of 3 intraocular lens (IOLs): monofocal, bifocal, and extended depth-of-focus (EDOF) IOLs targeting slight myopia.MethodsOverall, there were 60 cataract surgery eyes from 60 patients with implantation of a monofocal, bifocal or EDOF IOL (20 eyes in each IOL group). The EDOF IOLs targeted slight myopia (-0.25 D to -0.75 D). Intragroup comparison of visual acuity, defocus curve, objective optical quality, contrast sensitivity, Visual function questionnaire scores, patients’ overall satisfaction, and the astigmatism tolerance were performed 3 months after surgery.ResultsThe EDOF group provided equivalently excellent distance visual outcomes (0.06±0.12) as the monofocal (0.06±0.09) and bifocal (0.03±0.09) groups (P=0.554), better intermediate vision than the other 2 groups (P<0.05), and similarly satisfactory near visual outcomes (0.23±0.16 at 20 cm, and 0.17±0.14 at 33 cm) as the bifocal group (0.28±0.14 at 20 cm, and 0.08±0.10 at 33 cm) (P>0.05). The contrast sensitivity of EDOF IOL was slightly decreased compared to that of monofocal IOL, but it was better than that of bifocal IOL. The EDOF group showed significantly higher satisfaction than the bifocal group did when preoperative corneal astigmatism was 0.75 D or greater (P=0.009). A significant negative correlation between the corneal astigmatism and patient satisfaction was observed in only the bifocal group. ConclusionsThe EDOF IOLs targeting slight myopia offered satisfactory visual outcomes at an extended range from far to near distances. The EDOF and monofocal IOLs showed a better tolerance to astigmatism than did the bifocal IOL.

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