Dataset Information

Measurement of crystalline lens tilt in high myopic eyes before cataract surgery using swept-source optical coherence tomography.

ABSTRACT: Background:To measure the crystalline lens tilt in eyes with various degrees of myopia before cataract surgery using swept-source optical coherence tomography (SS-OCT). Methods:We used SS-OCT (IOLMaster 700) to scan 131 emmetropic eyes (axial length??30?mm, respectively) as part of the routine preoperative examination before cataract surgery. SS-OCT involved B-scans along six meridians. The data were analyzed to assess the magnitude and orientation of the lens tilt and their correlation with other optical biometric parameters. Result:The mean tilt was 3.36?±?0.98° in emmetropic eyes, 3.07?±?1.04° in mild/medium myopic eyes, and 2.35?±?1.01° in high myopic eyes. Tilt correlated significantly and inversely with axial length (Pearson's r?=?-?0.427, P?

SUBMITTER: Lu Q

PROVIDER: S-EPMC7059675 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Measurement of crystalline lens tilt in high myopic eyes before cataract surgery using swept-source optical coherence tomography.

Lu Qiang Q He Wenwen W Qian Dongjin D Lu Yi Y Zhu Xiangjia X

Eye and vision (London, England) 20200306

<h4>Background</h4>To measure the crystalline lens tilt in eyes with various degrees of myopia before cataract surgery using swept-source optical coherence tomography (SS-OCT).<h4>Methods</h4>We used SS-OCT (IOLMaster 700) to scan 131 emmetropic eyes (axial length < 24.5 mm), 25 mild/moderate myopic eyes (axial length 24.5-26 mm), and 123 high myopic eyes (52, 29, and 42 eyes with axial lengths of 26-28, 28-30, and > 30 mm, respectively) as part of the routine preoperative examination before cat ...[more]

PMID: 32161773

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Project description:PurposeTo describe enhanced vitreous imaging for visualization of anatomic features and microstructures within the posterior vitreous and vitreoretinal interface in healthy eyes using swept-source optical coherence tomography (SS-OCT). The study hypothesis was that long-wavelength, high-speed, volumetric SS-OCT with software registration motion correction and vitreous window display or high-dynamic-range (HDR) display improves detection sensitivity of posterior vitreous and vitreoretinal features compared to standard OCT logarithmic scale display.DesignObservational prospective cross-sectional study.MethodsMultiple wide-field three-dimensional SS-OCT scans (500×500A-scans over 12×12 mm2) were obtained using a prototype instrument in 22 eyes of 22 healthy volunteers. A registration motion-correction algorithm was applied to compensate motion and generate a single volumetric dataset. Each volumetric dataset was displayed in three forms: (1) standard logarithmic scale display, enhanced vitreous imaging using (2) vitreous window display and (3) HDR display. Each dataset was reviewed independently by three readers to identify features of the posterior vitreous and vitreoretinal interface. Detection sensitivities for these features were measured for each display method.ResultsFeatures observed included the bursa premacularis (BPM), area of Martegiani, Cloquet's/BPM septum, Bergmeister papilla, posterior cortical vitreous (hyaloid) detachment, papillomacular hyaloid detachment, hyaloid attachment to retinal vessel(s), and granular opacities within vitreous cortex, Cloquet's canal, and BPM. The detection sensitivity for these features was 75.0% (95%CI: 67.8%-81.1%) using standard logarithmic scale display, 80.6% (95%CI: 73.8%-86.0%) using HDR display, and 91.9% (95%CI: 86.6%-95.2%) using vitreous window display.ConclusionsSS-OCT provides non-invasive, volumetric and measurable in vivo visualization of the anatomic microstructural features of the posterior vitreous and vitreoretinal interface. The vitreous window display provides the highest sensitivity for posterior vitreous and vitreoretinal interface analysis when compared to HDR and standard OCT logarithmic scale display. Enhanced vitreous imaging with SS-OCT may help assess the natural history and treatment response in vitreoretinal interface diseases.

Dataset Information

Measurement of crystalline lens tilt in high myopic eyes before cataract surgery using swept-source optical coherence tomography.

Publications

Measurement of crystalline lens tilt in high myopic eyes before cataract surgery using swept-source optical coherence tomography.

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