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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="review-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Pediatric Ophthalmology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Pediatric Ophthalmology</journal-title><trans-title-group xml:lang="ru"><trans-title>Российская педиатрическая офтальмология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1993-1859</issn><issn publication-format="electronic">2412-432X</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">100683</article-id><article-id pub-id-type="doi">10.17816/rpoj100683</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Clinical recommendations</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Клинические рекомендации</subject></subj-group><subj-group subj-group-type="article-type"><subject>Review Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">The new edition of the international classification of retinopathy of premature. Part 1</article-title><trans-title-group xml:lang="ru"><trans-title>К вопросу о новой редакции международной классификации ретинопатии недоношенных. Часть 1</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4012-7324</contrib-id><contrib-id contrib-id-type="spin">7800-3264</contrib-id><name-alternatives><name xml:lang="en"><surname>Saidasheva</surname><given-names>Elvira I.</given-names></name><name xml:lang="ru"><surname>Сайдашева</surname><given-names>Эльвира Ирековна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Med.), professor</p></bio><bio xml:lang="ru"><p>доктор медицинских наук, профессор</p></bio><email>esaidasheva@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">North-Western State Medical University named after I.I. Mechnikov</institution></aff><aff><institution xml:lang="ru">Северо-Западный государственный медицинский университет им. И.И. Мечникова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Children’s city multidisciplinary clinical specialized center for high medical technologies</institution></aff><aff><institution xml:lang="ru">Детский городской многопрофильный клинический специализированный центр высоких медицинских технологий</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-05-28" publication-format="electronic"><day>28</day><month>05</month><year>2022</year></pub-date><volume>17</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>33</fpage><lpage>37</lpage><history><date date-type="received" iso-8601-date="2022-02-14"><day>14</day><month>02</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-03-31"><day>31</day><month>03</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, ООО "Эко-Вектор"</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">ООО "Эко-Вектор"</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2025-05-28"/></permissions><self-uri xlink:href="https://ruspoj.com/1993-1859/article/view/100683">https://ruspoj.com/1993-1859/article/view/100683</self-uri><abstract xml:lang="en"><p>Retinopathy of prematurity (ROP) is still one of the main causes of blindness and low vision from early childhood in developed countries and therefore remains the focus of attention of researchers and clinicians. The International Classification of Retinopathy of Prematurity (ICROP) was initially adopted in 1984, expanded in 1987, amended in 2005, and revised in 2021. Part 1 of this article discusses the new edition of the ICROP3. The reasons for updating the ICROP3 and the composition of the International Committee, which was specially organized for this purpose, are indicated. The new and third edition retains the current definitions (zone, stage, and extent of the disease). The main updates in ICROP3 include the improved classification of indicators, two of which, in the author’s opinion, are most significant for the acute stages of the disease. The definition of posterior zone II region and the recognition that retinal vascular changes in ROP represent a continuous spectrum from normal to preplus- and plus disease, with images demonstrating this range. In conclusion, the new edition of the ICROP3 requires a deep reading and discussion between domestic experts and must be introduced to clinical practices and the educational process. The next article will continue the discussion on the remaining additions/updates to ICROP3.</p></abstract><trans-abstract xml:lang="ru"><p>Ретинопатия недоношенных (РН) по-прежнему является одной из основных причин слепоты и слабовидения с раннего детства в развитых странах, поэтому остаётся в фокусе внимания исследователей и клиницистов. Первоначальная Международная классификация активной РН (МКРН) была принята в 1984 году, дополнена в 1987 и 2005 годах, пересмотрена в 2021 году. Часть 1-я настоящей статьи посвящена обсуждению третьей редакция классификации — МКРН3. Обозначены причины, потребовавшие обновления МКРН и состав Международного комитета, специально организованного для этой цели. Третья редакция сохраняет текущие определения, такие как зона, стадия и протяжённость болезни. Основные обновления в МКРН3 включают уточнённые показатели классификации. Дополнениями, наиболее значимыми для острых стадий заболевания, являются следующие: определение задней области зоны II и признание того, что сосудистые изменения сетчатки при РН представляют собой непрерывный спектр от нормального состояния до преплюс- и плюс-болезнь с изображениями, демонстрирующими этот диапазон. В заключении статьи отмечено, что новая редакция МКРН3 требует глубокого прочтения и обсуждения отечественными специалистами; внедрения в клиническую практику и учебный процесс. В следующей статье планируется продолжить обсуждение по остальным дополнениям и обновлениям МКРН3.</p></trans-abstract><kwd-group xml:lang="en"><kwd>retinopathy of prematurity</kwd><kwd>international classification</kwd><kwd>new third edition</kwd><kwd>discussion</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ретинопатия недоношенных</kwd><kwd>международная классификация</kwd><kwd>третья редакция</kwd><kwd>обсуждение</kwd></kwd-group><funding-group><funding-statement xml:lang="en">retinopathy of prematurity; international classification; new third edition; discussion.</funding-statement><funding-statement xml:lang="ru">ретинопатия недоношенных; международная классификация; новая третья редакция; обсуждение.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Reese AB, King MJ, Owens WC. Classification of retrolental fibroplasia. 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