Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector5676310.17816/kazmj56763Research ArticleOn the classification of trachomaKleinZ. G.info@eco-vector.comCivilian eye clinic130819302688088092412202024122020Copyright © 2021, Klein Z.G.2021<p style="text-align: justify;">The classifications of diseases of organs or organ systems in various departments of medicine are important not only for working schemes, but also represent the well-known result of the theoretical work of medicine in this area. As new material accumulates, these classifications are processed and take on a new form.</p>Kazan Medical archiveКазанский медицинский архив