Changing the paradigm of soft contact lens fitting: A sagittal height-based approach.

IF 2.8 3区 医学 Q1 OPHTHALMOLOGY
Ophthalmic and Physiological Optics Pub Date : 2025-05-01 Epub Date: 2025-03-15 DOI:10.1111/opo.13487
Juan José Cruz-Crespo, Sonia Ortiz-Peregrina, Andrea García-Gamero, Fátima Rodríguez-Farfach, Juan Bolívar-Parra, Razvan Ghinea
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引用次数: 0

Abstract

Objective: The present study evaluated the correlation between ocular sagittal height and lens sagittal depth, specifically focusing on the sagittal difference (δ-sag) that defines an optimal lens fit.

Methods: The ocular sagittal height (spanning a 14.2-mm chord in the ocular surface flattest meridian) of 30 subjects was measured using the Oculus Pentacam HR. Participants were fitted with eight different standard daily disposable soft contact lenses, each having a known sagittal depth. To evaluate the fit, both objective methods (using ImageJ software) and subjective assessments (by two experienced eye care professionals [ECPs]) were employed. Descriptive statistics were obtained for different δ-sag, and correlations and a regression model were applied to determine the δ-sag range indicative of a satisfactory lens fit, based on the objective and subjective evaluations.

Results: The δ-sag achieved in most cases ranged between 200 and 600 μm. Participants reported high comfort levels independently of δ-sag (H = 8.99; p = 0.25) and type of contact lens (χ2 = 1.47; p = 0.98). Significant correlations were found between δ-sag and objective assessments of lens centration (inferior, nasal and temporal) and movement (nasal lag). The regression model, based on the subjective assessment conducted by the ECPs, yielded a δ-sag of between 120 and 280 μm for a score considered as good.

Conclusions: Objective and subjective assessments showed significant associations with δ-sag. A standard cast-moulded disposable soft contact lens whose sagittal depth exceeded the ocular sagitta corresponding to the chord equivalent to the total contact lens diameter by 120-280 μm would most likely result in an optimal fit. These findings could help improve fitting accuracy and reduce dropout rates, thereby enhancing patient experience and ocular health.

改变软性隐形眼镜的验配模式:基于矢状面高度的方法。
目的:本研究评估眼矢状高度和晶状体矢状深度之间的相关性,特别关注定义最佳晶状体匹配的矢状差(δ-凹陷)。方法:使用Oculus Pentacam HR测量30例受试者的眼矢状高度(在眼表最平直经络上跨越14.2 mm弦)。参与者配备了八种不同的标准日用一次性软性隐形眼镜,每一种都有一个已知的矢状深度。采用客观方法(使用ImageJ软件)和主观方法(由两名经验丰富的眼科护理专业人员[ECPs]进行)来评估匹配度。对不同的δ-凹陷进行描述性统计,并结合客观评价和主观评价,运用相关性和回归模型确定晶状体拟合满意的δ-凹陷范围。结果:大多数病例的δ-sag值在200 ~ 600 μm之间。参与者报告了与δ-sag无关的高舒适水平(H = 8.99;P = 0.25)、隐形眼镜类型(χ2 = 1.47;p = 0.98)。δ-下垂与客观评价晶状体集中(下、鼻和颞)和运动(鼻滞后)之间存在显著相关性。基于ECPs主观评价的回归模型得出的δ-sag值在120 ~ 280 μm之间,评分为好。结论:客观和主观评价与δ-sag有显著相关性。标准的铸造一次性软性隐形眼镜,其矢状深度超过与隐形眼镜总直径等值的弦对应的眼矢状深度120-280 μm,最可能达到最佳配合。这些发现有助于提高配合器的准确性和降低掉包率,从而提高患者的体验和眼部健康。
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
CiteScore
5.10
自引率
13.80%
发文量
135
审稿时长
6-12 weeks
期刊介绍: Ophthalmic & Physiological Optics, first published in 1925, is a leading international interdisciplinary journal that addresses basic and applied questions pertinent to contemporary research in vision science and optometry. OPO publishes original research papers, technical notes, reviews and letters and will interest researchers, educators and clinicians concerned with the development, use and restoration of vision.
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