[Biomechanical control of myopia: potential of bidirectional corneal applanation with high-speed video recording].

Q3 Medicine Vestnik oftalmologii Pub Date : 2024-01-01 DOI:10.17116/oftalma202414005125

S E Avetisov, A K Dzamikhova, K S Avetisov, A V Kobzeva, S K Abukerimova

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Abstract

The introduction of bidirectional corneal applanation technologies into clinical practice made possible the in vivo assessment of biomechanical properties of the fibrous tunic in myopic eyes.

Purpose: This study analyzes the potential of bidirectional corneal applanation with high-speed video recording for biomechanical control of myopia, focusing on the biomechanical parameters of the sclera and cornea.

Material and methods: The study included 129 patients (168 eyes) with myopia ranging from -0.75 to -13.25 D in spherical equivalent. The axial length (AL) and central corneal thickness (CCT) ranged from 22.64 to 29.05 mm and from 492 to 644 µm, respectively. AL was measured using laser biometry, CCT with a rotating Scheimpflug camera, and the biomechanical properties of the fibrous tunic were assessed using bidirectional corneal pneumatic applanation with high-speed video recording using the Corvis ST device.

Results: A weak positive correlation was found between AL and CCT, while no significant correlation was observed between CCT and the stress-strain index (SSI). However, there was a significant negative correlation between SSI and AL. Additionally, a clear and statistically significant trend of decreasing SSI with increasing AL was identified.

Conclusion: The stress-strain index (SSI), determined using bidirectional corneal pneumatic applanation with high-speed video recording, could potentially be considered a clinical indicator characterizing the scleral component of the ocular fibrous tunic in the biomechanical control of myopia.

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[近视的生物力学控制：高速视频记录双向角膜测压的潜力]。

目的：本研究分析了高速视频记录下的双向角膜塑形镜在近视生物力学控制方面的潜力，重点关注巩膜和角膜的生物力学参数：研究对象包括 129 名近视患者（168 只眼），近视度数为球面等效-0.75 至-13.25 D。轴长（AL）和角膜中央厚度（CCT）分别为 22.64 至 29.05 毫米和 492 至 644 微米。角膜轴长（AL）和角膜中央厚度（CCT）分别为 22.64 至 29.05 毫米和 492 至 644 微米。角膜轴长（AL）是用激光生物测量仪测量的，角膜中央厚度（CCT）是用旋转式 Scheimpflug 摄像机测量的，而纤维膜的生物力学特性则是用双向角膜气压applanation评估的，并使用 Corvis ST 设备进行高速视频记录：结果：发现AL与CCT之间存在微弱的正相关，而CCT与应力应变指数（SSI）之间无明显相关。然而，SSI 与 AL 之间存在明显的负相关。此外，随着 AL 的增加，SSI 呈明显的下降趋势，这在统计学上具有重要意义：结论：应力应变指数（SSI）是通过高速视频记录的双向角膜气压applanation测定的，有可能被认为是在近视的生物力学控制中表征眼球纤维膜巩膜成分的临床指标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Vestnik oftalmologii Medicine-Ophthalmology

CiteScore

0.80

自引率

0.00%

发文量

129

期刊介绍： The journal publishes materials on the diagnosis and treatment of eye diseases, hygiene of vision, prevention of ophthalmic affections, history of Russian ophthalmology, organization of ophthalmological aid to the population, as well as the problems of special equipment. Original scientific articles and surveys on urgent problems of theory and practice of Russian and foreign ophthalmology are published. The journal contains book reviews on ophthalmology, information on the activities of ophthalmologists" scientific societies, chronicle of congresses and conferences.The journal is intended for ophthalmologists and scientific workers dealing with clinical problems of diseases of the eye and physiology of vision.