Binocular Implantation of New Diffractive Trifocal Intraocular Lens for Presbyopia Correction

Pershin, K.B.; Pashinova, N.F.; Цыганков, А. Ю.; Miyovich, O.P.; Likh, I.A.; Гурмизов, Е. П.

doi:10.18821/0869-2106-2018-24-5-228-232

Cited by 2 publications

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“…Внедрение в клиническую практику бифокальных интраокулярных линз (ИОЛ) с двумя точками фокусировки обеспечивает достижение приемлемой остроты зрения вблизи и вдаль, но не на среднем расстоянии [2,3]. Для удовлетворения возрастающих нужд пациентов и получения высокой остроты зрения на среднем расстоянии были внедрены принципы моновидения и трифокальной интраокулярной коррекции [4][5][6][7][8][9][10]. Вместе с тем, несмотря на очевидные преимущества, данные методы имеют и ряд недостатков.…”

Section: актуальностьunclassified

“…Оценка остроты зрения вблизи, на среднем расстоянии и вдаль у пациентов с имплантацией ИОЛ Tecnis Symfony ZXR00 проведена в сроки 1 день, 1 неделя, 1, 3 и 6 месяцев после операции (рис. [3][4][5][6][7][8].…”

Section: результаты и их обсуждениеunclassified

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First Experience of Multifocal and Toric Extended Depth of Focus Intraocular Lenses Implantation (Short-Term Analysis)

et al. 2021

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Aim. Analysis of the functional results of new IOL with an extended depth of focus implantation a in the short-term (6 months) follow-up period.Patients and methods. The prospective study included 27 patients (40 eyes) after bilateral (n = 12) or monolateral (n = 15) implantation of EDOF IOL Tecnis Symfony with an average follow-up period of 6.5 ± 0.2 (6–7) months. In all cases, IOL implantation was preceded by cataract phacoemulsification or removal of the transparent lens for refractive purposes. The age range was from 39 to 78 (60.6 ± 10.1) years. EDOF IOL Tecnis Symfony ZXR00 was implanted in 30 eyes, and toric EDOF IOL Tecnis Symfony ZXT100, ZXT150, ZTX225, and ZXT300 were implanted in 10 eyes in the presence of clinically significant astigmatism.Results. An increase in UCNVA from 0.18 ± 0.04 to 0.79 ± 0.11, UCIVA from 0.21 ± 0.07 to 0.89 ± 0.10, UCDVA from 0.24 ± 0.06 to 0.95 ± 0.16, BCNVA from 0.61 ± 0.05 to 0.80 ± 0.03, BCIVA from 0.58 ± 0.10 to 0.97 ± 0.19, and BCDVA from 0.65 ± 0.08 to 1.0 ± 0.06 (p < 0.05 in all cases). The spherical equivalent of refraction decreased from –4.5 ± 1.8 in the preoperative period to –0.18 ± 0.92 in the follow-up period of 6 months after implantation of the Tecnis Symfony ZXR00 IOL. In the group with toric IOLs, a decrease in the cylindrical component of refraction was shown from 1.33 ± 1.02 (modulo) to 0.61 ± 0.44 (modulo) during the maximum observation period. In all cases, the rotational stability of the implanted IOLs was noted. In 9 patients out of 24 (37.5 %), permanent or periodic optical phenomena were detected, of which 4 patients (16.7 %) had halos, 3 (12.5 %) had glare, and 2 (8.3 %) had difficulty driving in the dark. These side effects did not affect the overall patient satisfaction — 22 patients (91.7 %) rated the result of the operation as “excellent”, and 2 patients (8.3 %) — as “good”.Conclusion. The paper presents an analysis of the first experience in the Russian Federation of implantation of new IOLs with extended depth of focus and their toric version in 27 patients. Data on the effectiveness of this IOL for vision correction at all distances, low frequency of side optical phenomena, and high patient satisfaction are presented. Further comparative studies with other multifocal IOLs are needed.

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Section: актуальностьunclassified

Section: результаты и их обсуждениеunclassified

First Experience of Multifocal and Toric Extended Depth of Focus Intraocular Lenses Implantation (Short-Term Analysis)

et al. 2021

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Calculation of Intraocular Lens Optical Power with Enhanced Depth of Focus

Pershin

Pashinova

Цыганков³

et al. 2022

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Relevance. The new Increased Depth of Focus (EDOF) Intraocular Lens (IOL) technology is designed to improve the correction of visual acuity at a medium distance without compromising distance vision correction and provides a restoration of visual acuity in the distance and at an average distance, but at the same time a lower frequency of side optical phenomena and better contrast sensitivity compared to other multifocal IOLs (MIOL). Regardless of the technology used and the type of lens, the result of surgery and patient satisfaction depend on the optimization of the calculation of the optical strength of the IOL. To date, there is no consensus in the available literature on the choice of a formula for calculating the optical power of known EDOF IOLs.Aim. Retrospective analysis of the accuracy of 7 formulas for optical power calculation of a new extended depth of focus intraocular lens.Methods. The retrospective study included 34 patients (62 eyes) with implantation of a new EDOF Tecnis Symfony IOL ZXR00. The mean age of the patients was 61.9 ± 9.4 (39–87) years. IOL optical power range was +5.0 to +30.0 D, target refraction was –0.25 to 0.25 D. The average follow-up period for the patients was 12.3 ± 1.8 months. The SRK/T, Barrett Universal II, Haigis, Hoffer Q, Holladay 2, Olsen, and Kane formulas were retrospectively analyzed for effectiveness using appropriate constants. Each formula was optimized for the study group of patients to achieve an average refractive error as close to zero as possible. For each formula, the mean error (ME), mean absolute error (MAE), standard deviation (SD), median absolute error (MedAE), maximum absolute error (MaxAE), and percentage of eyes within the error range of 0.25, 0.5, 1.0, and 2.0 D were calculated.Results. The optimized constants were LF = 2.21, a0 = 1.43, a1 = 0.39, a2 = 0.12, personalized ACD=5.68, ACD (Hoffer Q / Holladay 2) = 5.68/5.66, A-constant (SRK/T / Kane) = 119.5/119.4. For the SRK/T, Barrett Universal II, Kane and Haigis formulas the lowest MAE is shown. Application of the Hoffer Q and Holladay 2 formulas are associated with the highest MAE. The Barrett Universal II, SRK/T, Kane, and Haigis formulas were characterized by the highest percentage of reaching refraction of ±0.25 D (64, 62, 59, and 53, respectively). For all of the formulas examined, the frequency of reaching refraction of ±1.00 D was greater than 90% and within ±2.00 D greater than 97%.Conclusion. This study was the first to retrospectively compare seven formulas for calculating the optical power of a new intraocular lens with an enhanced depth of focus. The SRK/T, Barrett Universal II, Haigis, and Kane formulas are recommended for calculating the optical power of the indicated IOL in clinical practice.

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Binocular Implantation of New Diffractive Trifocal Intraocular Lens for Presbyopia Correction

Cited by 2 publications

References 13 publications

First Experience of Multifocal and Toric Extended Depth of Focus Intraocular Lenses Implantation (Short-Term Analysis)

First Experience of Multifocal and Toric Extended Depth of Focus Intraocular Lenses Implantation (Short-Term Analysis)

Calculation of Intraocular Lens Optical Power with Enhanced Depth of Focus

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