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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">helmholtzeyeinstitute</journal-id><journal-title-group><journal-title xml:lang="ru">Российский офтальмологический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Ophthalmological Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2072-0076</issn><issn pub-type="epub">2587-5760</issn><publisher><publisher-name>Real time Publishers</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21516/2072-0076-2023-16-4-127-132</article-id><article-id custom-type="elpub" pub-id-type="custom">helmholtzeyeinstitute-1366</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>В ПОМОЩЬ ПРАКТИЧЕСКОМУ ВРАЧУ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>FOR OPHTHALMOLOGY PRACTITIONERS</subject></subj-group></article-categories><title-group><article-title>Двухэтапный расчет силы интраокулярной линзы при помутнениях хрусталика, исключающих измерение аксиальной длины глазного яблока с помощью оптической биометрии. Клинический случай</article-title><trans-title-group xml:lang="en"><trans-title>Double-step calculation of the intraocular lens power in lens opacities excluding the measurement of axial eye length by optical biometry. A clinical case</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5274-6993</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Куликов</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Kulikov</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Николаевич Куликов — д-р мед. наук, профессор, начальник кафедры офтальмологии им. В.В. Волкова</p><p>ул. Академика Лебедева, д. 6, Санкт-Петербург, 194044, Россия</p></bio><bio xml:lang="en"><p>Aleksey N. Kulikov — Dr. of Med. Sci, professor, head of ophthalmology chair named after professor V.V. Volkov</p><p>6, Academician Lebedev St., St. Petersburg, 194044, Russia</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8211-6327</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Даниленко</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Danilenko</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Екатерина Владимировна Даниленко — канд. мед. наук, начальник отделения хирургии катаракты клиники офтальмологии</p><p>ул. Академика Лебедева, д. 6, Санкт-Петербург, 194044, Россия</p></bio><bio xml:lang="en"><p>Ekaterina V. Danilenko — Cand. of Med. Sci., head of cataract surgery department, clinic of ophthalmology</p><p>6, Academician Lebedev St., St. Petersburg, 194044, Russia</p></bio><email xlink:type="simple">danilka83@list.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6913-4619</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Невин</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nevin</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Николай Викторович Невин — врач-офтальмолог отделения хирургии катаракты клиники офтальмологии</p><p>ул. Академика Лебедева, д. 6, Санкт-Петербург, 194044, Россия</p></bio><bio xml:lang="en"><p>Nikolay V. Nevin — ophthalmologist of cataract surgery department, clinic of ophthalmology</p><p>6, Academician Lebedev St., St. Petersburg, 194044, Russia</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8016-0394</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кожевников</surname><given-names>Е. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozhevnikov</surname><given-names>E. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Евгений Юрьевич Кожевников — слушатель ординатуры кафедры офтальмологии им. В.В. Волкова</p><p>ул. Академика Лебедева, д. 6, Санкт-Петербург, 194044, Россия</p></bio><bio xml:lang="en"><p>Evgeny Yu. Kozhevnikov — resident at ophthalmology chair named after professor V.V. Volkov</p><p>6, Academician Lebedev St., St. Petersburg, 194044, Russia</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБВОУ ВО «Военно-медицинская академия им. С.М. Кирова» МО РФ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>S.M. Kirov Military Medical Academy</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>29</day><month>12</month><year>2023</year></pub-date><volume>16</volume><issue>4</issue><fpage>127</fpage><lpage>132</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Куликов А.Н., Даниленко Е.В., Невин Н.В., Кожевников Е.Ю., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Куликов А.Н., Даниленко Е.В., Невин Н.В., Кожевников Е.Ю.</copyright-holder><copyright-holder xml:lang="en">Kulikov A.N., Danilenko E.V., Nevin N.V., Kozhevnikov E.Y.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://roj.igb.ru/jour/article/view/1366">https://roj.igb.ru/jour/article/view/1366</self-uri><abstract><p>Основной источник ошибок в расчете силы интраокулярной линзы (ИОЛ) при факоэмульсификации (ФЭ) — погрешность измерения передне-задней оси глаза (ПЗО) в условиях невозможности проведения оптической биометрии.</p><p>Цель работы — описать оригинальный способ двухэтапного расчета силы ИОЛ при помутнениях хрусталика без исходного измерения ПЗО с помощью оптической биометрии.</p><sec><title>Материал и методы</title><p>Материал и методы. Пациенту С. (71 год) с двусторонней незрелой катарактой проведена ФЭ без имплантации ИОЛ на правом глазу. Затем ПЗО была измерена в состоянии афакии при прозрачных оптических средах и использована в сочетании с дооперационными данными биометрии переднего отрезка для расчета силы ИОЛ. На втором этапе имплантирования выбрана линза с увеличенной глубиной фокуса.</p></sec><sec><title>Результат</title><p>Результат. Пациент был осмотрен и выписан на второй день после операции с остротой зрения OD 0,3 sph +0,25 cyl -0,75 ax150 = 0,5 и с признаками умеренной кератопатии. Через 2 нед острота зрения составила уже 0,9 и не поддавалась коррекции с помощью очковых линз; пациент поступил для хирургического лечения катаракты на левом глазу и прооперирован также по двухэтапной схеме. Величина ПЗО, измеренная оптическим методом в состоянии афакии, была на 0,31 мм меньше измеренной до операции. Через 6 мес после ФЭ с имплантацией ИОЛ острота зрения обоих глаз для дали составила 1,2, пациент бинокулярно справлялся с чтением и работой на персональном компьютере без затруднений.</p></sec><sec><title>Заключение</title><p>Заключение. Двухэтапный подход к расчету силы ИОЛ оправдан при выраженном снижении прозрачности хрусталика, особенно в осложненных случаях, например при миопии высокой степени или необходимости имплантации премиальной линзы, при использовании которой пациенты особенно требовательны к достижению рефракции цели, хотя это и связано с необходимостью отсрочить имплантацию линзы, чтобы провести ее после уточнения длины ПЗО в условиях афакии.</p></sec></abstract><trans-abstract xml:lang="en"><p>The main source of intraocular lens (IOL) power calculation errors in phacoemulsification (PE) is axial length (AL) measurement inaccuracy in cases if optical biometry cannot be used.</p><p>bto describe an original double-step method of IOL power calculation in lens opacities which exclude AL measurement with optical biometry.</p><sec><title>Material and methods</title><p>Material and methods. Patient S. (male, 71) with a bilateral immature cataract underwent right eye phacoemulsification (PE) with no IOL implantation. After that, AL was measured in the aphakic state with transparent optical media and used in combination with preoperative anterior segment biometry data to calculate the IOL power. In the second stage, a selected lens with an extended focus range was implanted.</p></sec><sec><title>Results</title><p>Results. The patient was examined and discharged on the second day after surgery with visual acuity OD 0.3 sph +0.25 cyl -0.75 ax150 = 0.5 and signs of moderate postoperative keratopathy. After 2 weeks, uncorrected visual acuity was as high as 0.9 and could not be further corrected by spectacle lenses. The patient was admitted for surgical treatment of the left eye cataract and also operated in two stages. The AL measured by the optical method in the aphakic state, was 0.31 mm less than that measured before the operation. Six months after PE with IOL implantation, distance visual acuity in both eyes was 1.2, the patient could use binocular vision for reading and PC work with no difficulty.</p></sec><sec><title>Conclusion</title><p>Conclusion. The double-step approach to IOL power calculation is justified in cases of strong decrease of crystalline lens transparency, especially in complicated cases, for example, in high myopia or “premium” lens implantation, in which patients are especially sensitive to correct target refraction, even though this approach requires a delayed IOL implantation, which should take place after a precise calculation of AL taken in the aphakic state.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>расчет силы интраокулярной линзы</kwd><kwd>оптическая биометрия</kwd><kwd>погрешность расчета</kwd></kwd-group><kwd-group xml:lang="en"><kwd>intraocular lens power calculation</kwd><kwd>optical biometry</kwd><kwd>calculation error</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Tehrani M, Krummenauer F, Blom E, Dick HB. 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