Intraocular lens power calculation for eyes with an axial length greater than 26.0 mm: Comparison of formulas and methods

Abulafia, Adi; Barrett, Graham D.; Rotenberg, Michael; Kleinmann, Guy; Levy, Adi; Reitblat, Olga; Koch, Douglas D.; Wang, Li; Assia, Ehud I.

doi:10.1016/j.jcrs.2014.06.033

Cited by 137 publications

(125 citation statements)

References 12 publications

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“…Standard third-generation IOL calculation formulas, which use IOL constants, can lead to unexpected hyperopic IOL prediction errors in eyes with long axial length [17-22]. In this regard, Kane et al[21] reported that the mean prediction error of the IOLMaster in eyes with an axial length of ≥26 mm (version 5.4) was 0.21 dpt using the Haigis formula, –0.20 dpt using the Barrett Universal II, and 0.392 dpt or 0.370 dpt as the MedAE.…”

Section: Discussionmentioning

confidence: 99%

Clinical Evaluation of a New Swept-Source Optical Coherence Biometer That Uses Individual Refractive Indices to Measure Axial Length in Cataract Patients

et al. 2019

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Backgrounds: Although the OCT biometer using individual refractive index is available, comparisons of measurement value and intraocular lens (IOL) power calculation error with other SS-OCT biometers are not known. Objectives: To compare the new SS-OCT biometer ARGOS (OCTB1), which uses individual refractive indices to measure axial length, with the IOLMaster 700 (OCTB2) and OA-2000 (OLCR), which use equivalent refractive index. Method: Six hundred and twenty-two eyes of 622 patients who had been diagnosed with cataract were enrolled in the study. Among the 158 eyes that had undergone cataract surgery, the postoperative refractive error was evaluated using the Haigis formula. Results: The axial length measured by the OCTB1 showed a proportional bias in comparison with the other two biometers and a fixed bias in eyes with an axial length ≥26 mm. No significant difference was found in the median absolute refractive prediction error (p = 0.3278). However, in eyes with an axial length ≥26 mm, the OCTB1 showed myopic error compared with the other two biometers (p < 0.0001). Conclusions: In eyes with long axial length, when the conventional IOL calculation was optimized with the equivalent refractive index-based instrument, we need to consider that IOL calculation using OCTB1 tends to cause slightly myopic refractive prediction error.

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Section: Discussionmentioning

confidence: 99%

Clinical Evaluation of a New Swept-Source Optical Coherence Biometer That Uses Individual Refractive Indices to Measure Axial Length in Cataract Patients

et al. 2019

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“…22 Apart from technical difficulties, accurate refractive predictability of cataract surgery in highly myopic postvitrectomized eyes is challenging and often leads to unexpected postoperative hyperopia. 10 …”

Section: Discussionmentioning

confidence: 99%

“…9 Cataract surgery in highly myopic eyes can be complicated by zonular instability, extreme deepening of the anterior chamber (known as "lens-iris diaphragm retropulsion syndrome"), higher risk of postoperative retinal detachment, difficulties in predicting correct IOL power, and lower visual potential. [10][11][12] Theoretically, some of these challenges may be avoided by using FLACS, which helps to create a perfectly round anterior capsulotomy and softens the lens nucleus.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser–assisted cataract surgery in vitrectomized eye with posterior chamber phakic intraocular lens

et al. 2017

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SummaryWe describe a case of femtosecond laser-assisted cataract surgery (FLACS) in an eye with multiple comorbidities, including retinal detachment surgery, high myopia, posterior chamber phakic intraocular lens (PC pIOL) and residual, emulsified, silicone oil located in the anterior chamber. FLACS was affected by the optical blockage, but the incomplete capsular tear was recoverable. The case suggests that silicone oil bubbles concentrated at the dome of the posterior corneal surface, along with the PC pIOL optic edges and scars after corneal astigmatic relaxing incisions can lead to incomplete anterior capsulotomy.

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“…Adi Abulafia, et al 15 compared the predicted refractions calculated using standard formulae (Holladay 1, SRK/T, Hoffer Q and Haigis) with optical IOL constants, User Group for Laser Interference Biometry constants and concluded that the SRK/T, Hoffer Q, Haigis, Barrett Universal II, Holladay 2 and Olsen methods met the benchmark criteria of having a prediction error of ±0.5 D in at least 71.0% of eyes and ±1.0 D in 93.0% of eyes with positive power IOLs (>+6D ), whereas with low positive or negative powered IOLs Barrett Universal II formula and the Holladay 1 and Haigis formulae using the AL-adjusted method met those criteria.…”

Section: Age 43 To 69 Yearsmentioning

confidence: 99%

Predictive Accuracy of Various Iol Power Calculation Formulae in High Axial Myopia: A Prospective Comparative Study

Thakur¹,

Saxena²,

Jain³

et al. 2016

jemds

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PURPOSETo compare the accuracy of Intraocular Lens (IOL) power calculation formulae in high axial myopia. MATERIAL AND METHODS27 eyes of 22 patients with axial length between 26mm to 30mm were studied. The eyes were divided in to two groups, Group 1 with AL 26-28mm consisting of 23 eyes and Group 2 with AL 28-30mm consisting of four eyes. The predictive accuracy of four formulae SRK-T, Hoffer Q, Haigis and Holladay 2 were evaluated and compared. The statistical analysis was carried out with SPSS Software 21.0 version with P value >0.05 considered significant. RESULTSThe predictive capability within ±1 D of these formulae in Group 1 is 88% with SRK-T, 87% with Hoffer Q, 88% with Haigis and 91% with Holladay 2 and within ±0.5 D is 61%, 61%, 69% and 73% respectively. In Group 2 which consisted of 4 eyes with AL between 28-30mm the results were 83%, 83%, 84%, 90%, 59%, 61%, 70%, 71% respectively. CONCLUSIONThe performance of SRK-T, Hoffer Q and Haigis was comparable for target refraction of ±1.0 D, whereas Haigis and Holladay 2 gave relatively better results for target refraction of ±0.5 D for Group 1 and Haigis and Holladay 2 performed better for Group 2.

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Intraocular lens power calculation for eyes with an axial length greater than 26.0 mm: Comparison of formulas and methods

Abstract: No author has a financial or proprietary interest in any material or method mentioned.

Cited by 137 publications

References 12 publications

Clinical Evaluation of a New Swept-Source Optical Coherence Biometer That Uses Individual Refractive Indices to Measure Axial Length in Cataract Patients

Clinical Evaluation of a New Swept-Source Optical Coherence Biometer That Uses Individual Refractive Indices to Measure Axial Length in Cataract Patients

Femtosecond laser–assisted cataract surgery in vitrectomized eye with posterior chamber phakic intraocular lens

Predictive Accuracy of Various Iol Power Calculation Formulae in High Axial Myopia: A Prospective Comparative Study

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