Abstract
Background. Age-related decline in accommodation in patients with emmetropia, myopia and hyperopia is characterized by multidirectional changes in the thickness of the ciliary muscle and the configuration of the inner apex of the ciliary body. The structural and functional state of the ciliary muscle and its individual components and the patterns of their change with age in patients with hyperopia remain little studied.Aim: to study the structural and functional state of the ciliary muscle and its components in patients with hyperopia using mathematical modeling methods.Methods. 110 patients (220 eyes) with axial hyperopia were examined. The first group consisted of patients aged 18–30 years – 20 people. The second group consisted of 80 patients aged 45–65 years. The control group consisted of 30 healthy volunteers aged from 18 to 30 years. All patients underwent ultrasound biomicroscopy, on the basis of which a spatial-mathematical model was created using the ImageJ software package.Results and conclusion. In patients with hyperopia, in the aging process there is a transformation of the ciliary body and the restructuring of its muscular components. Structural irido-ciliary relationships in young patients with emmetropia and hyperopia significantly differ in the location and configuration of the inner apex of the ciliary body, the degree of emphasis on the circular portion of the ciliary muscle.
Highlights
Age-related decline in accommodation in patients with emmetropia, myopia and hyperopia is characterized by multidirectional changes in the thickness of the ciliary muscle and the configuration of the inner apex of the ciliary body
Полученные данные позволяют сделать предположение, что снижение функциональной активности мышцы Мюллера при проведении ранней полной оптической коррекции может служить методом профилактики гидростатических блоков у пациентов с гиперметропией старшего возраста
Структурные иридо-цилиарные взаимоотношения у молодых пациентов с эмметропией и гиперметропией существенно различаются по расположению и конфигурации внутренней вершины цилиарного тела, степени акцентирования циркулярной порции цилиарной мышцы
Summary
Age-related decline in accommodation in patients with emmetropia, myopia and hyperopia is characterized by multidirectional changes in the thickness of the ciliary muscle and the configuration of the inner apex of the ciliary body. При нормальном старении у пациентов с гиперметропией происходит снижение аккомодации, увеличение и уплотнение хрусталика и нарастание изменений цилиарной мышцы с увеличением доли соединительной ткани (коллагенизация) [1]. Увеличение толщины цилиарного тела в области внутренней вершины составляет, по данным A.L. Sheppard и L.N. Davies (2011), до 2,8–3 мкм в год [1, 2]. Возрастное снижение аккомодации у пациентов с эмметропией, миопией и гиперметропией характеризуется разнонаправленными изменениями толщины цилиарной мышцы и конфигурации внутренней вершины цилиарного тела [9].
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