Офтальмохирургия. 2021; : 14-20
Анализ влияния наклона и децентрации ИОЛ на индуцированный астигматизм при исследовании методом трассировки лучей на модели глаза
https://doi.org/10.25276/0235-4160-2021-3-14-20Аннотация
Цель. Определение влияния наклона и децентрации интраокулярной линзы (ИОЛ) на величину индуцированного астигматизма при теоретическом исследовании с помощью программного обеспечения на модели глаза. Материал и методы. Для проведения расчета была выполнена модель глаза с заданными параметрами. Модуляция изменения волнового фронта проводилась в программе Zemax (LLC, США). На модели глаза анализировалась вероятность индуцирования астигматизма в зависимости от изменения положения асферической ИОЛ Acrysof IQ 16,0, 22,0 и 24,0 дптр и торической модели Acrysof IQ Toric SN6AT3, SN6AT4 и SN6AT5. Исследовался угол наклона ИОЛ относительно горизонтальной плоскости от 0° до 10° с шагом 1°, децентрации от 0,1 до 1,5 мм с шагом 0,1 мм. При каждой позиции ИОЛ регистрировались данные аберраций 2 порядка Z (2,2). Полученные результаты использовались для расчета критического угла наклона и децентрации. Результаты. Индуцированный астигматизм усиливался с увеличением степени наклона и децентрации и соответственно нарастанию оптической силы ИОЛ. Критически значимыми были значения 3,0° наклона для асферической ИОЛ с оптической силой 22,0 и 22,0 дптр и 3,5° для 16,0 дптр, децентрации – 0,7 и 1,0 мм соответственно. Наклон торической интраокулярной линзы (ТИОЛ) относительно горизонтальной плоскости выявил индуцирование астигматизма на 0,3 дптр при величине наклона 3–4°. Выводы. Наклон и децентрация асферической ИОЛ и ТИОЛ индуцируют астигматизм в зависимости от увеличения оптической силы ИОЛ. Горизонтальный наклон ТИОЛ способствует индуцированию астигматизма при установке цилиндрического компонента по оси 90°.
Список литературы
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20. Куликова И.Л., Тимофеева Н.С. Сравнительный анализ клинико-функциональных результатов и положения интраокулярной линзы после фемтолазерассистированной и стандартной факоэмульсификации катаракты. Acta Biomed. 2019;4(4): 139–144. doi: 10.29413/ABS.2019-4.4.22
21. Weikert MP, Golla A, Wang L. Astigmatism induced by intraocular lens tilt evaluated via ray tracing. J Cataract Refract Surg. 2018;44(6): 745–749. doi: 10.1016/j.jcrs.2018.04.035
Fyodorov Journal of Ophthalmic Surgery. 2021; : 14-20
Analysis of the effect of intraocular lens tilt and decentration on induced astigmatism by ray tracing on the model eye
https://doi.org/10.25276/0235-4160-2021-3-14-20Abstract
Purpose. Determination of the influence of the intraocular lens (IOL) inclination and decentration on the magnitude of induced astigmatism in a theoretical study using software on an eye model. Material and methods. An eye model with the specified parameters was performed to carry out the calculation. Modulation of the change in the wavefront was carried out using the Zemax program (LLC, USA). In the model eye, the probability of induction of astigmatism was analyzed depending on the change in the position of the aspherical IOL Acrysof IQ 16.0, 22.0 and 24.0 diopters and the toric model Acrysof IQ Toric SN6AT3, SN6AT4 and SN6AT5. The angle of inclination of the IOL relative to the horizontal plane was examined from 0° to 10° with a step of 1°, decentr ation from 0.1 to 1.5 mm with a step of 0.1 mm. At each IOL position, aberration data of the 2nd order Z (2, 2) were recorded. The obtained results were used to calculate the critical tilt angle and decentration. Results. The magnitude of induced astigmatism increased with the rise of the degree of inclination and decentration, corresponding to an increase in the optical power of the IOL. Accordingly, critically significant were the values of 3.0° inclination for the aspherical IOL with an optical power of 22.0 and 22.0 diopters and 3.5° for 16.0 diopters, decentration – 0.7 mm and 1.0 mm. The inclination of the TIOL relative to the horizontal plane revealed the induction of the magnitude of inverse astigmatism, according to an increase in the inclination angle of 0.3 diopters at a slope of 3–4°. Conclusions. The tilt and decentration of the aspherical and TIOL patterns induce astigmatism depending on the increase in IOL power. The inclination of the TIOL in relation to the horizontal plane set at 90° promotes the induction of astigmatism.
References
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