Characterization and prediction of the clinical result with a specific model of mini-scleral contact lens in corneas with keratoconus.

IF 4.1 1区医学 Q1 OPHTHALMOLOGY

Eye and Vision Pub Date : 2022-10-06 DOI:10.1186/s40662-022-00310-5

Abdelkader Sidi Mohamed Hamida, García-Barchín Marta, Ruiz-Fortes Pedro, David P Piñero

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Abstract

Background: To investigate which factors are correlated with the visual improvement achieved with a specific model of scleral contact lens (SCL) in keratoconus (KC) eyes and to define a model to predict such improvement according to the pre-fitting data. In addition, the changes occurred with the fitting of a specific model of SCL during a period of 3 months in corneas with KC have been investigated.

Methods: Longitudinal retrospective study including 30 eyes of 18 patients (age, 14-65 years) with KC fitted with the SCL ICD16.50 (Paragon Vision Sciences). Visual, refractive, corneal tomographic and ocular aberrometric changes were evaluated during a 3-month follow-up. Likewise, the characterization of the post-lens meniscus was performed by optical coherence tomography (OCT) with the measurement of central, nasal and temporal vaults.

Results: The visual acuity increased significantly from a mean pre-fitting value with spectacles of 0.23 ± 0.07 logarithm of minimal angle of resolution (logMAR) to a mean value of 0.10 ± 0.04 logMAR after 1 month of SCL wear (P < 0.001). An improvement of 1 or more lines of visual acuity with the SCL occurred in 62.1% of the eyes. A significant decrease in central, nasal, and temporal vault was observed after 1 month of SCL wear (P ≤ 0.046). Likewise, there was a significant difference between nasal and temporal vaults during the first month of SCL use (P = 0.008). Furthermore, a significant reduction of ocular high order (P = 0.028) and primary coma root mean square (P = 0.018) was found with the SCL. A predicting linear equation of the change in visual acuity achievable with the SCL was obtained (P < 0.001, R² = 0.878) considering the pre-fitting spectacle corrected distance visual acuity, and the power and sagittal lens of SCL.

Conclusions: The scleral contact lens evaluated provides an efficacious visual rehabilitation in KC due to the improvement of visual acuity and the correction of low and high-order ocular aberrations. This visual acuity improvement can be predicted from some pre-fitting variables.

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圆锥角膜微型巩膜隐形眼镜模型的临床疗效预测。

背景:探讨特定模型巩膜接触镜(SCL)对圆锥角膜(KC)眼视力改善的影响因素，并根据预拟合数据建立预测模型。此外，我们还研究了KC角膜在3个月的时间里，在特定的SCL模型的拟合下发生的变化。方法:对18例30眼，年龄14 ~ 65岁的KC患者进行纵向回顾性研究，该患者安装了SCL ICD16.50 (Paragon Vision Sciences)。在3个月的随访中评估视力、屈光、角膜层析成像和眼像差的变化。同样，通过光学相干断层扫描(OCT)测量中央、鼻和颞穹窿，对晶状体后半月板进行表征。结果:考虑到预配眼镜矫正距离视力、SCL的度数和矢状晶状体，配戴SCL 1个月后，视力从配戴前的平均0.23±0.07对数最小分辨角(logMAR)显著提高到0.10±0.04对数分辨角(logMAR) (P = 0.878)。结论:巩膜接触镜可改善KC患者的视力，矫正低阶和高阶眼像差，具有良好的视力康复效果。这种视力的改善可以通过一些预拟合变量来预测。

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来源期刊

Eye and Vision OPHTHALMOLOGY-

CiteScore

8.60

自引率

2.40%

发文量

审稿时长

15 weeks

期刊介绍： Eye and Vision is an open access, peer-reviewed journal for ophthalmologists and visual science specialists. It welcomes research articles, reviews, methodologies, commentaries, case reports, perspectives and short reports encompassing all aspects of eye and vision. Topics of interest include but are not limited to: current developments of theoretical, experimental and clinical investigations in ophthalmology, optometry and vision science which focus on novel and high-impact findings on central issues pertaining to biology, pathophysiology and etiology of eye diseases as well as advances in diagnostic techniques, surgical treatment, instrument updates, the latest drug findings, results of clinical trials and research findings. It aims to provide ophthalmologists and visual science specialists with the latest developments in theoretical, experimental and clinical investigations in eye and vision.