Intraoperative Refractive Biometry for Predicting Intraocular Lens Power Calculation after Prior Myopic Refractive Surgery

Ianchulev, Tsontcho; Hoffer, Kenneth J.; Yoo, Sonia H.; Chang, David F.; Breen, Michael G.; Padrick, Thomas; Tran, Dan B.

doi:10.1016/j.ophtha.2013.08.041

Cited by 126 publications

(136 citation statements)

References 20 publications

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“…Results similar to this study are noted in a recent investigation that used aberrometry for IOL power calculation in 246 myopic eyes after LVC; the authors reported a MedAE of 0.35 D and an MAE of 0.42 D, with 67% of eyes within AE0.50 D of the intended correction. 16 With regard to Fourier-domain OCT, one small study reported an MAE of 0.50 D compared with an MAE of 0.39 to 0.44 D in the current investigation. 17 Although no method in this study proved statistically superior, it stands to reason that obtaining historical treatment data would add to the accuracy of IOL prediction power.…”

Section: Discussionmentioning

confidence: 43%

Comparison of Intraoperative Aberrometry, OCT-Based IOL Formula, Haigis-L, and Masket Formulae for IOL Power Calculation after Laser Vision Correction

2015

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Section: Discussionmentioning

confidence: 43%

Comparison of Intraoperative Aberrometry, OCT-Based IOL Formula, Haigis-L, and Masket Formulae for IOL Power Calculation after Laser Vision Correction

2015

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“…[1][2][3][4] The sources of the prediction errors in these eyes are well known. 1,5,6 Nevertheless, IOL power prediction for these eyes remains problematic.…”

mentioning

confidence: 99%

Accuracy of the Barrett True-K formula for intraocular lens power prediction after laser in situ keratomileusis or photorefractive keratectomy for myopia

Abulafia¹,

Hill²,

Koch³

et al. 2016

Journal of Cataract and Refractive Surgery

147

106

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“…Although the developers of the ORA Talbot–Moiré interferometry intraoperative device (WaveTec Vision, USA) claim excellent refractive outcomes,3 6 no data on the intraoperative formulae, measurement failure and reproducibility have been reported or independently validated. Furthermore, Ianchulev et al used pooled results from 66 different investigators, including fellow eyes and a range of differing IOL designs, which makes analysis and generalisation very difficult 3. By contrast, strengths of our study are that only one observer took the intraoperative measurements and that only one IOL design was used.…”

Section: Discussionmentioning

confidence: 99%

“…Real-time biometry during cataract surgery could improve refractive outcomes, and be especially valuable in more challenging cases, for instance, after refractive surgery 2 3…”

Section: Introductionmentioning

confidence: 99%

Intraoperative aberrometry-based aphakia refraction in patients with cataract: status and options

et al. 2016

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AimTo explore the application of intraoperative wavefront aberrometry (IWA) for aphakia-based biometry using three existing formulae derived from autorefractive retinoscopy and introducing new improved formulae. Methods In 74 patients undergoing cataract surgery, three repeated measurements of aphakic spherical equivalent (SE) were taken. All measurements were objectively graded for their quality and evaluated with the 'limits of agreement' approach. ORs were calculated and analysis of variance was applied. The intraocular lens (IOL) power that would have given the target refraction was back-calculated from manifest refraction at 3 months postoperatively. Regression analysis was performed to generate two aphakic SE-based formulae for predicting this IOL. The accuracy of the formulae was determined by comparing them to conventional biometry and published aphakia formulae. Results In 32 eyes, three consecutive aphakic measurements were successful. Objective parameters of IWA map quality significantly impacted measurement variability ( p<0.05). The limits of agreement of repeated aphakic SE readings were +0.66 dioptre (D) and −0.69 D. Intraoperative biometry by our formula resulted in 25% and 53% of all cases ±0.50D and ±1.00 D within SE target, respectively. A second formula that took axial length (AL) into account resulted in improved ratios of 41% and 70%, respectively. Conclusions A reliable application of IWA to calculate IOL power during routine cataract surgery may not be feasible given the high rate of measurement failures and the large variations of the readings. To enable reliable IOL calculation from IWA, measurement precision must be improved and aphakic IOL formulae need to be finetuned.

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Intraoperative Refractive Biometry for Predicting Intraocular Lens Power Calculation after Prior Myopic Refractive Surgery

Cited by 126 publications

References 20 publications

Comparison of Intraoperative Aberrometry, OCT-Based IOL Formula, Haigis-L, and Masket Formulae for IOL Power Calculation after Laser Vision Correction

Comparison of Intraoperative Aberrometry, OCT-Based IOL Formula, Haigis-L, and Masket Formulae for IOL Power Calculation after Laser Vision Correction

Accuracy of the Barrett True-K formula for intraocular lens power prediction after laser in situ keratomileusis or photorefractive keratectomy for myopia

Intraoperative aberrometry-based aphakia refraction in patients with cataract: status and options

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