Metaanalysis of intraocular lens power calculation after laser refractive surgery in myopic eyes

Chen, Xu; Yuan, Fei; Wu, Lianqun

doi:10.1016/j.jcrs.2015.12.005

Cited by 62 publications

(47 citation statements)

References 25 publications

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“…Abulafia et al [34] found that the Barrett True K No History formula had significantly smaller variance in prediction error than the Shammas formula and performed similar to the Haigis-L and Modified-Masket formulas. A meta-analysis by Chen et al [35] concluded that the clinical history method was significantly inaccurate in predicting postoperative refraction than the Haigis-L formula. The current study also had similar findings that formulas using no prior data (i.e., Barrett True K No History and Haigis-L) and refractive change after LASIK (i.e., Barrett True K) are accurate.…”

Section: Discussionmentioning

confidence: 99%

Visual Outcomes, Quality of Vision, and Quality of Life of Diffractive Multifocal Intraocular Lens Implantation after Myopic Laser In Situ Keratomileusis: A Prospective, Observational Case Series

Chang

Chan

et al. 2017

Journal of Ophthalmology

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Purpose. To report visual performance and quality of life after implantation of a bifocal diffractive multifocal intraocular lens (MIOL) in postmyopic laser in situ keratomileusis (LASIK) patients. Methods. Prospective, observational case series. Patients with prior myopic LASIK who had implantation of Tecnis ZMA00/ZMB00 MIOL (Abbott Medical Optics) at Hong Kong Sanatorium and Hospital were included. Postoperative examinations included monocular and binocular distance, intermediate and near visual acuity (VA), and contrast sensitivity; visual symptoms (0–5); satisfaction (1–5); spectacle independence rate; and quality of life. Results. Twenty-three patients (27 eyes) were included. No intraoperative complications developed. Mean monocular uncorrected VA at distance, intermediate, and near were 0.13 ± 0.15 (standard deviation), 0.22 ± 0.15, and 0.16 ± 0.15, respectively. Corresponding mean values for binocular uncorrected VA were 0.00 ± 0.10, 0.08 ± 0.13, and 0.13 ± 0.10, respectively. No eyes lost >1 line of corrected distance VA. Contrast sensitivity at different spatial frequencies between operated and unoperated eyes did not differ significantly (all P > 0.05). Mean score for halos, night glare, starbursts, and satisfaction were 1.46 ± 1.62, 1.85 ± 1.69, 0.78 ± 1.31, and 3.50 ± 1.02, respectively. Eighteen patients (78%) reported complete spectacle independence. Mean composite score of the quality-of-life questionnaire was 90.31 ± 8.50 out of 100. Conclusions. Implantation of the MIOL after myopic LASIK was safe and achieved good visual performance.

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Section: Discussionmentioning

confidence: 99%

Visual Outcomes, Quality of Vision, and Quality of Life of Diffractive Multifocal Intraocular Lens Implantation after Myopic Laser In Situ Keratomileusis: A Prospective, Observational Case Series

Chang

Chan

et al. 2017

Journal of Ophthalmology

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“…Haigis [7] found that the ME of the Haigis-L formula was not significantly different from 0. Chen et al [10] found through meta-analysis that Shammas c.d. with the Shammas-PL formula outperformed the Haigis-L formula in eyes after laser refractive surgery.…”

Section: Discussionmentioning

confidence: 99%

“…Most methods can be classified into two groups: methods that need data before the LASIK that patients underwent and methods that were based only on current measurements. Usually, the data before LASIK are not available or reliable, and literature has shown that no-history approaches are superior [7–10], which are widely used in clinical practice now. A series of methods that are used for calculating corrected corneal power (K c ) are accepted for their accessibility and convenience.…”

Section: Introductionmentioning

confidence: 99%

Prediction accuracy of intraocular lens power calculation methods after laser refractive surgery

Liu

Liao

2017

BMC Ophthalmol

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BackgroundThis study aimed to evaluate the prediction accuracy of postoperative refractions using partial coherence interferometry (IOL-Master) and applanation ultrasound (AL-3000) assisted with corneal topography (TMS-4) in eyes that had undergone myopic laser-assisted in situ keratomileusis (LASIK).MethodsHaigis-L formula, Koch–Maloney method using Haigis formula, Shammas clinically derived K-value (simulated keratometric value) correction (Shammas c.d.) using Haigis formula, and Shammas post-LASIK (Shammas-PL) formula were used in eyes with myopic LASIK. Constants were derived from the optimized constants in 133 virgin eyes. Refractive outcomes were determined by streak retinoscopy and subjective manifest refraction. Methods and formulas were evaluated by mean error (ME), standard deviation (SD), range of error, mean absolute error (MAE), median absolute error, 95% confidence interval of MAE, and percentage of eyes within ±0.5 diopter (D), ±1.0 D, and ±1.5 D of prediction.ResultsSDs of the Haigis-L, Koch-Maloney method using the Haigis formula, Shammas c.d. using the Haigis formula, and the Shammas-PL formula using IOL-Master were 0.721, 0.695, 0.695, and 0.698; and those using AL-3000 assisted with TMS-4 were 0.782, 0.741, 0.743, and 0.778, respectively.ConclusionsNo-history methods that corrected corneal power with measurements using IOL-Master were promising in myopic post-LASIK eyes, but still a gap in prediction accuracy exists between virgin eyes and post-LASIK eyes.Electronic supplementary materialThe online version of this article (doi:10.1186/s12886-017-0439-x) contains supplementary material, which is available to authorized users.

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“…Para determinar el poder del lente intraocular a implantar, de manera que el ojo operado quede lo mas cerca posible de la emetropía, se requiere conocer al menos dos datos: la longitud axial del ojo y el poder de la córnea. Basándose en estos datos (y otros adicionales en algunos casos) las fórmulas intentan predecir la posición en que se ubicará el lente intraocular, y posteriormente calcular su poder dióptrico ideal en un segundo paso 7,8,17 .…”

Section: Cálculo Del Poder De Los Lentes Intraocularesunclassified

Cambios corneales producidos por la cirugía refractiva con excimer láser: revisión de tema

Galvis

Tello

Jaramillo

et al. 2017

revmed

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RESUMENEl auge de la cirugía refractiva con excimer láser en las últimas dos décadas se ha reflejado en que un grupo creciente de pacientes con antecedente de este procedimiento necesitan ahora cirugía de catarata. Debido a las modificaciones generadas en la córnea por la fotoablación con el láser, la determinación del poder corneal necesario para el cálculo del poder del lente intraocular a implantar en la cirugía de catarata, es difícil. Teniendo en cuanta estos aspectos se hace una revisión de las causas de estos errores de medición y los abordajes existentes para minimizar su impacto. MÉD.UIS. 2017;30(1):99-105.Palabras clave: Láseres de Excímeros. Queratectomía Fotorrefractiva. Topografía de la Córnea. Córnea. Changes produced by corneal refractive surgery with excimer laser: a review ABSTRACTThe rise of excimer laser refractive surgery in the last two decades has been reflected in a growing group of patients with a history of this procedure who now need cataract surgery. Because the generated modifications to the cornea with the laser photoablation, determining the corneal power, necessary for calculating the power of the intraocular lens to be implanted during the cataract surgery, is difficult. We review the causes of these errors of measurement and existing approaches to minimize its impact. IntroduccIónLa cirugía refractiva con excimer láser en sus diferentes modalidades, se emplea para corregir los defectos visuales (miopía, hipermetropía o astigmatismo) generando cambios en la curvatura de la córnea 1,2 . Los resultados actuales de estos procedimientos, con los equipos de última generación que poseen capacidades técnicas avanzadas, son buenos, y la satisfacción de los pacientes es muy alta [3][4][5] . Por otra parte, cuando estos pacientes llegan a la edad adulta avanzada, tienen el riesgo natural de presentar cambios seniles en el cristalino y de requerir cirugía de catarata 6 . El cálculo del poder del lente intraocular

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Metaanalysis of intraocular lens power calculation after laser refractive surgery in myopic eyes

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

Cited by 62 publications

References 25 publications

Visual Outcomes, Quality of Vision, and Quality of Life of Diffractive Multifocal Intraocular Lens Implantation after Myopic Laser In Situ Keratomileusis: A Prospective, Observational Case Series

Visual Outcomes, Quality of Vision, and Quality of Life of Diffractive Multifocal Intraocular Lens Implantation after Myopic Laser In Situ Keratomileusis: A Prospective, Observational Case Series

Prediction accuracy of intraocular lens power calculation methods after laser refractive surgery

Cambios corneales producidos por la cirugía refractiva con excimer láser: revisión de tema

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