Comparison of IOL Power Calculation Formulas for a Trifocal IOL in Eyes With High Myopia

Tan, Qian; Lin, Ding; Wang, Li; Chen, Bichao; Tang, Qiongyan; Xu, Chen; Chen, Maosheng; Tan, Jianxin; Zhang, Jingsong; Wu, Lei; Zhu, Xiao; Wang, Yong

doi:10.3928/1081597x-20210506-01

Cited by 10 publications

(7 citation statements)

References 28 publications

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“…This study was able to add that the Kane, EVO, and SRK/T-CMAL formulas performed similarly to BU-II and Hill-RBF in predominately Caucasian eyes. Similar studies in four Asian populations and one European population also found newer-generation formulas such as the Kane, EVO, and BU-II to be most accurate in long eyes [ 38 , 39 , 40 , 41 , 42 ].…”

Section: Discussionmentioning

confidence: 61%

Accuracy of Six Intraocular Lens Power Calculations in Eyes with Axial Lengths Greater than 28.0 mm

Moshirfar

Durnford

Jensen

et al. 2022

JCM

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The purpose of this study was to compare the accuracy of several intraocular (IOL) lens power calculation formulas in long eyes. This was a single-site retrospective consecutive case series that reviewed patients with axial lengths (AL) > 28.0 mm who underwent phacoemulsification. The Wang–Koch (WK) adjustment and Cooke-modified axial length (CMAL) adjustment were applied to Holladay 1 and SRK/T. The median absolute error (MedAE) and the percentage of eyes with prediction errors ±0.25 diopters (D), ±0.50 D, ±0.75 D, and ±1.00 D were used to analyze the formula’s accuracy. This study comprised a total of 35 eyes from 25 patients. The Kane formula had the lowest MedAE of all the formulas, but all were comparable except Holladay 1, which had a significantly lower prediction accuracy with either AL adjustment. The SRK/T formula with the CMAL adjustment had the highest accuracy in predicting the formula outcome within ±0.50 D. The newer formulas (BU-II, EVO, Hill-RBF version 3.0, and Kane) were all equally predictable in long eyes. The SRK/T formula with the CMAL adjustment was comparable to these newer formulas with better outcomes than the WK adjustment. The Holladay 1 with either AL adjustment had the lowest predictive accuracy.

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Section: Discussionmentioning

confidence: 61%

Accuracy of Six Intraocular Lens Power Calculations in Eyes with Axial Lengths Greater than 28.0 mm

Moshirfar

Durnford

Jensen

et al. 2022

JCM

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“…This is particularly relevant for intraocular lens (IOL) power calculations, where accurate biometric data are essential for optimal visual outcomes [20,21]. The study's findings could inform the development of more precise biometric models for IOL power calculations, especially in patients with extreme ALs [22]. The correlation between the PSL and the AL, especially in cases of high myopia, underscores the role of posterior segment elongation in the progression of myopia.…”

Section: Discussionmentioning

confidence: 88%

Ocular Biometry Features and Their Relationship with Anterior and Posterior Segment Lengths among a Myopia Population in Northern China

Bian,

Li,

Qin

et al. 2024

JCM

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Objectives: The study aims to explore the ocular biometry of a myopic population in Northern China, focusing specifically on anterior and posterior segment lengths. Methods: This is a cross-sectional study. The medical records of 3458 myopic patients who underwent refractive surgery were evaluated. Axial length (AL), anterior chamber depth (ACD), lens thickness (LT) and other biometric parameters were measured using the IOL Master 700. The study determined the anterior segment length (ASL = ACD + LT), the posterior segment length (PSL = AL − ASL) and the ratio of ASL to PSL (ASL/PSL). Results: This study included 3458 eyes from 3458 myopic patients (1171 men and 2287 women). The mean age was 27.38 ± 6.88, ranging from 16 to 48 years old. The mean ASL was 7.35 ± 0.27 mm, and the mean PSL was 18.39 ± 1.18 mm. The ASL and PSL trends demonstrate an age-related increase for both genders, with notable gender-specific variations. Across most age groups, males typically exhibited higher ASLs and PSLs than females, with the exception of the 35–40 and 40–45 age groups. The ASL and PSL consistently increased with a rising AL. The AL strongly correlates with the PSL and negatively correlates with the ASL/PSL ratio. The ACD and LT moderately correlate with the ASL, but an increased LT does not imply a longer posterior segment. The CCT and SE show little correlation with axial eye parameters. Conclusions: Among Chinese myopic patients, a longer ASL and PSL were correlated with older age and the male gender. The AL strongly correlates positively with the PSL and negatively correlates with the ASL/PSL ratio. An elongation of the posterior segment may primarily account for an eyeball’s lengthening.

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“…A similar trend was also noted in high myopes with trifocal IOL calculations. The Barrett Universal II, Olsen, Kane, and EVO 2.0 formulas produced a statistically lower median absolute error than the SRK/T formulas (p < 0.05) [ 8 ]. Moreover, the Barrett Universal II formula produced higher percentages of eyes within ±0.50 D of the prediction error compared to the SRK/T formula (p < 0.05).…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, the Barrett Universal II formula produced higher percentages of eyes within ±0.50 D of the prediction error compared to the SRK/T formula (p < 0.05). However, there were no significant differences in the prediction accuracy of all formulas tested in axial lengths less than 28 mm [ 8 ].…”

Section: Discussionmentioning

confidence: 99%

The Role of Multifocal Intraocular Lens Implantation in Extreme Axial Myopia: A Case Report and Literature Review

LoBue¹,

Catapano²,

DeNaro³

et al. 2023

Cureus

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The prevalence of high myopia is rising globally. In addition to an increased risk of retinal detachment, high myopia is associated with earlier cataract formation. Patients with myopia are also often more motivated to become spectacle-independent after a lens procedure. However, the use of multifocal intraocular lens (MfIOL) remains controversial for patients with extreme myopia, which is classified as patients with an axial length >28 mm. Here, we present the case of a 64-year-old patient with visually significant cataract and extreme axial myopia >31 mm in both eyes who desired to be spectacle-independent. A preoperative workup revealed a normal macula with peripheral lattice degeneration. On optical coherence tomography, the macula had a normal fovea contour without the presence of a staphyloma. A thorough peripheral examination was performed by a retina specialist which required no prophylactic treatment. Pentacam analysis demonstrated a low spherical aberration and minimal ectasia risk. Cataract surgery was uneventful with a 5 mm laser capsulotomy centered over the visual axis with the placement of a trifocal intraocular lens. Two months after the cataract surgery, the remaining refractive error was corrected with a laser-assisted in situ keratomileusis enhancement. The patient achieved an uncorrected distance visual acuity of 20/15-and uncorrected near visual acuity of J1+ in both eyes. Overall, this case report and review aims to highlight important preoperative, intraoperative, and postoperative techniques to improve patient outcomes with MfIOL in patients with extreme myopia.

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Comparison of IOL Power Calculation Formulas for a Trifocal IOL in Eyes With High Myopia

Cited by 10 publications

References 28 publications

Accuracy of Six Intraocular Lens Power Calculations in Eyes with Axial Lengths Greater than 28.0 mm

Accuracy of Six Intraocular Lens Power Calculations in Eyes with Axial Lengths Greater than 28.0 mm

Ocular Biometry Features and Their Relationship with Anterior and Posterior Segment Lengths among a Myopia Population in Northern China

The Role of Multifocal Intraocular Lens Implantation in Extreme Axial Myopia: A Case Report and Literature Review

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