Accuracy of five intraocular lens formulas in eyes with trifocal lens implant

Mălăescu, Monica; Stanca, Horia Tudor; Tăbăcaru, Bogdana; Stănilă, Adriana; Stanca, Simona; Danielescu, Ciprian

doi:10.3892/etm.2020.8891

Cited by 8 publications

(8 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Discussionmentioning

confidence: 99%

“…20 Another study reported that RPE tended to be within ±0.25 D for most eyes analyzed using the Haigis formula and within ±0.50 D for all eyes analyzed using the Barrett Universal II formula among eyes with an axial length between 22.0 mm and 24.5 mm. 21 In this study, we estimated the preoperative RPE for 180 eyes using three well-known IOL power formulas, including the third-generation SRK/T formula and the fourth-generation Barrett Universal II and Haigis formulas, and compared them with the intraoperative prediction of ORA to determine the most suitable method for IOL power selection in eyes with TFNT lenses. 22 Although the accuracy of the IOL power formulas improved with optimization, the accuracy of refractive prediction for TFNT IOLs was the highest with ORA compared with that calculated using the SRK/T, Barrett Universal II, and Haigis formulas even after optimization of the IOL power formulas.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Refractive Accuracy of ORA and the Factors Impacting Residual Astigmatism in Patients Implanted with Trifocal IOLs During Cataract Surgery: A Retrospective Observational Study

Watanabe¹

2022

OPTH

View full text Add to dashboard Cite

Purpose To assess the refractive accuracy of the intraoperative aberrometer Optiwave Refractive Analysis (ORA) and evaluate factors impacting residual astigmatism in eyes implanted with PanOptix (TFNT) trifocal intraocular lenses (IOLs) during cataract surgery. Patients and Methods This retrospective study examined 180 eyes implanted with a toric or non-toric trifocal IOL during cataract surgery. The mean refractive prediction error (RPE), median absolute RPE, and percentage of eyes with an absolute RPE ≤0.25, ≤0.50, ≤0.75, and ≤1.00 diopter (D) were determined for ORA and each of the IOL power formulas (Sanders–‍Retzlaff–Kraft/Theoretical [SRK/T], Barrett Universal II, and Haigis). Correlation analysis of postoperative residual astigmatism and factors associated with it was performed using Pearson’s and Spearman correlations in eyes with non-toric trifocal IOLs. Results After optimization, the median absolute RPE was 0.19 D, 0.25 D, 0.20 D, and 0.26 D in eyes measured using ORA and the SRK/T, Barrett Universal II, and Haigis formulas, respectively. An absolute RPE ≤0.50 D after optimization was noted in 92.8%, 83.3%, 88.3%, and 81.1% of the eyes using ORA and the SRK/T (p=0.0093), Barrett Universal II (p=0.2071), and Haigis (p=0.0018) formulas, respectively, showing significant differences between ORA and the SRK/T and Haigis formulas. The mean±standard deviation subjective residual astigmatism in non-toric IOL eyes (N=76) was 0.46±0.39 D and showed a strong positive correlation with preoperative objective refractive astigmatism ( r =0.2925, p=0.0109), intraoperative ORA–measured astigmatism ( r =0.5555, p<0.0001), postoperative objective refractive astigmatism ( r =0.8188, p<0.0001), and postoperative total corneal astigmatism (TCA) ( r =0.4051, p=0.0003) and a negative correlation with preoperative anterior corneal astigmatism ( r =−0.3541, p=0.0017). Conclusion ORA is a salient tool for improving the postoperative refractive accuracy of trifocal IOL power calculations and may help in determining the need for toric IOL use in astigmatic eyes with cataracts. Residual astigmatism correlated with objective refractive astigmatism, ORA-measured astigmatism, and postoperative TCA.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Evaluation of Refractive Accuracy of ORA and the Factors Impacting Residual Astigmatism in Patients Implanted with Trifocal IOLs During Cataract Surgery: A Retrospective Observational Study

Watanabe¹

2022

OPTH

View full text Add to dashboard Cite

show abstract

“…Among the more modern formulas, the lowest refractive error was reported using SRK/ T [24], with keratometry derived from the 3-mm central zone in the axial map of corneal topography [25]. Recent studies are focused on newer generation formulas, in the attempt to find the one with the greatest accuracy in calculating the IOL power [26][27][28]. One study that evaluated the refractive accuracy of Hoffer Q, SRK/ T, Holladay I, Holladay II, Haigis and Barrett Universal II formulas in eyes with keratoconus, found that, while all formulas tended to have a hyperopic error, the Barrett Universal II formula was the most accurate for mild to moderate disease [29] but further research is needed in this regard.…”

Section: Discussionmentioning

confidence: 99%

Toric intraocular lens implantation – atypical cases

Lazar

Tăbăcaru

Stanca

et al. 2020

rjo

Self Cite

View full text Add to dashboard Cite

Objective: To describe the results of toric intraocular lens (IOL) implantation in three atypical cases (four eyes) with cataract and corneal astigmatism: one with bilateral keratoconus, one with pellucid marginal degeneration and one with buphthalmos due to congenital glaucoma. Methods: Three patients (four eyes) with corneal astigmatism (one with bilateral keratoconus, one with pellucid marginal degeneration and one with buphthalmos due to congenital glaucoma) underwent cataract surgery by standard phacoemulsification and the implantation of toric IOLs in the capsular bag. The presence of corneal astigmatism was identified by automated keratometry and confirmed by Scheimpflug-based corneal tomography. The toric IOL implanted in all cases was a single-piece AcrySof Toric IOL (Alcon Laboratories, Inc.). Postoperative visual acuity, the reduction in the refractive astigmatism, the spherical equivalent (SE) and the rotational stability of the toric IOL were recorded for all the patients. Results: Visual acuity increased and the refractive astigmatism decreased in all cases. In Case 1, the right eye achieved a postoperative uncorrected visual acuity (UCVA) of 20/ 20, a decrease in the refractive astigmatism from -3 DCyl to -0.75 DCyl and a spherical equivalent (SE) of -0.25. The left eye presented with a best-corrected visual acuity (BCVA) of 20/ 20, a decrease in the refractive astigmatism from -1.50 DCyl to -1.25 DCyl and a SE of -0.25. In Case 2, the postoperative UCVA was 20/ 20, with a decrease in the refractive astigmatism from -5.5 DCyl to -1 DCyl and a SE for the right eye of 0.00 D. In Case 3, the postoperative BCVA was 20/ 20, with a decrease in the refractive astigmatism from -4.75 DCyl to -1.50 DCyl and a SE of +1.25. No misalignment of the axis of the toric IOL was observed in any patient at subsequent follow-ups. The postoperative visual acuity was satisfactory for all the patients. Conclusions: Toric intraocular lenses can be an effective option for implantation in patients with cataract and corneal astigmatism in atypical situations such as mild to moderate keratoconus, pellucid marginal degeneration and buphthalmos due to congenital glaucoma. Predicting the refractive outcome is difficult in atypical cases and the surgeon should have accuracy and consistency in the preoperative measurements, for achieving satisfactory postoperative results.

show abstract

“…The refractive inclusion criteria were: Manifest hyperopia up to 6.00 diopter (D) with or without astigmatism up to 5.00 D and spherical equivalent +6.00 D at most. Patients outside these limits were referred for intraocular surgery, either phakic Femtosecond-LASIK outcomes using the VisuMax ® -MEL ® 80 platform for hyperopia and hyperopic astigmatism refractive surgery intraocular lenses or refractive lens exchange, according to patient age and ocular biometric considerations (35)(36)(37).…”

Section: Methodsmentioning

confidence: 99%

Femtosecond‑LASIK outcomes using the VisuMax^®‑MEL^® 80 platform for hyperopia and hyperopic astigmatism refractive surgery

et al. 2021

Self Cite

View full text Add to dashboard Cite

The present study evaluated the efficacy, the safety and the predictability of the Femtosecond laser-assisted in situ keratomileusis (Femto-LASIK) procedure for hyperopia and hyperopic astigmatism. We retrospectively analyzed the postoperative 12-month evolution of 593 eyes with hyperopia and hyperopic astigmatism that underwent Femto-LASIK treatment. The procedure was predictable and effective. No eye lost 2 lines of corrected distance visual acuity (CDVA), demonstrating a safety profile of the procedure. Nine percent of the eyes gained at least one line of CDVA. The accuracy of the spherical equivalent after 12 months was 74% within ±1.0 diopter (D) of emmetropia. The refractive outcomes were stable during the follow-up period. There were no significant complications during the procedure. Femto-LASIK using the VisuMax ® -MEL ® 80 platform was demonstrated to be a suitable option to correct selected cases of hyperopia and hyperopic astigmatism. A longer follow-up period is required to better assess the refractive results and to detect any further regression.

show abstract

Accuracy of five intraocular lens formulas in eyes with trifocal lens implant

Cited by 8 publications

References 35 publications

Evaluation of Refractive Accuracy of ORA and the Factors Impacting Residual Astigmatism in Patients Implanted with Trifocal IOLs During Cataract Surgery: A Retrospective Observational Study

Evaluation of Refractive Accuracy of ORA and the Factors Impacting Residual Astigmatism in Patients Implanted with Trifocal IOLs During Cataract Surgery: A Retrospective Observational Study

Toric intraocular lens implantation – atypical cases

Femtosecond‑LASIK outcomes using the VisuMax^®‑MEL^® 80 platform for hyperopia and hyperopic astigmatism refractive surgery

Contact Info

Product

Resources

About

Accuracy of five intraocular lens formulas in eyes with trifocal lens implant

Cited by 8 publications

References 35 publications

Evaluation of Refractive Accuracy of ORA and the Factors Impacting Residual Astigmatism in Patients Implanted with Trifocal IOLs During Cataract Surgery: A Retrospective Observational Study

Evaluation of Refractive Accuracy of ORA and the Factors Impacting Residual Astigmatism in Patients Implanted with Trifocal IOLs During Cataract Surgery: A Retrospective Observational Study

Toric intraocular lens implantation – atypical cases

Femtosecond‑LASIK outcomes using the VisuMax®‑MEL® 80 platform for hyperopia and hyperopic astigmatism refractive surgery

Contact Info

Product

Resources

About

Femtosecond‑LASIK outcomes using the VisuMax^®‑MEL^® 80 platform for hyperopia and hyperopic astigmatism refractive surgery