ArticleBiomedical engineering online2014
Automatic method of analysis and measurement of additional parameters of corneal deformation in the Corvis tonometer.
Article in Biomedical engineering online, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.
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Who cites it
39 citing papers in PubMed, 72 citations in OpenAlex.
- The Relationship between Corvis ST Tonometry and Ocular Response Analyzer Measurements in Eyes with Glaucoma.PloS one · 2016Trial
- Corvis ST parameters in primary open angle and angle closure glaucoma after propensity score matching.Scientific reports · 2026Article
- Corvis ST parameters in eyes with primary angle-closure glaucoma: a retrospective cross-sectional study using propensity score matching.BMC ophthalmology · 2026Article
- Relationship between Corvis ST tonometry parameters and mean blur rate in the optic nerve head tissue area in healthy eyes.PloS one · 2026Article
- The Impact of Dry Eye Disease on Corneal Biomechanics Analyzed with Corneal Visualization Scheimpflug Technology.Biomedicines · 2025Article
- The influence of corneal biomechanical factors on surgically induced corneal astigmatism.Scientific reports · 2025Article
- Comparison of the outcomes of trabeculectomy and Ab interno trabeculotomy on corneal biomechanics.Scientific reports · 2025Observational
- Usefulness of Measuring Corneal Stiffness in Predicting the Reduction of Intraocular Pressure With Microhook Ab Interno Trabeculotomy.Translational vision science & technology · 2025Article
- The Application of Terahertz Technology in Corneas and Corneal Diseases: A Systematic Review.Bioengineering (Basel, Switzerland) · 2025Review
- Corneal biomechanical predictors of intraocular pressure elevation after intravitreal anti-VEGF injection.PloS one · 2025Observational
- Comparing Corneal Biomechanic Changes between Solo Cataract Surgery and Microhook Ab Interno Trabeculotomy.Journal of clinical medicine · 2024Article
- Biomechanical properties measured with dynamic Scheimpflug analyzer in central serous chorioretinopathy.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2024Article
- Comparing corneal biomechanic changes among solo cataract surgery, microhook ab interno trabeculotomy and iStent implantation.Scientific reports · 2023Article
- Smoking, alcohol consumption and corneal biomechanical parameters among Chinese university students.Eye (London, England) · 2023Article
- Comparison of Corvis ST Parameters between Primary Open-Angle Glaucoma and Primary Angle-Closure Glaucoma.Journal of clinical medicine · 2023Article
- Comparison of two analyzer measurements focusing on material stiffness among normal, treatment-naïve, and treated glaucoma eyes.Scientific reports · 2023Article
- Patient-specific air puff-induced loading using machine learning.Frontiers in bioengineering and biotechnology · 2023Article
- Measurement of corneal biomechanical properties in diabetes mellitus using the Corvis ST.Medicine · 2022Article
- Estimation of scleral mechanical properties from air-puff optical coherence tomography.Biomedical optics express · 2021Article
- A Novel Indentation Assessment to Measure Corneal Biomechanical Properties in Glaucoma and Ocular Hypertension.Translational vision science & technology · 2021Article
Corrections and comments
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Authors and funding
1 author at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionThe method for measuring intraocular pressure using the Corvis tonometer provides a sequence of images of corneal deformation. Deformations of the cornea are recorded using the ultra-high-speed Scheimpflug camera. This paper presents a new and reproducible method of analysis of corneal deformation images that allows for automatic measurements of new features, namely new three parameters unavailable in the original software. MATERIAL AND
methodThe images subjected to processing had a resolution of 200 × 576 × 140 pixels. They were acquired from the Corvis tonometer and simulation. In total 14,000 2D images were analysed. The image analysis method proposed by the author automatically detects the edge of the cornea and sclera fragments. For this purpose, new methods of image analysis and processing proposed by the author as well as those well-known, such as Canny filter, binarization, median filtering etc., have been used. The presented algorithms were implemented in Matlab (version 7.11.0.584-R2010b) with Image Processing toolbox (version 7.1-R2010b) using both known algorithms for image analysis and processing and those proposed by the author.
resultsOwing to the proposed algorithm it is possible to determine three parameters: (1) the degree of the corneal reaction relative to the static position; (2) the corneal length changes; (3) the ratio of amplitude changes to the corneal deformation length. The corneal reaction is smaller by about 30.40% compared to its static position. The change in the corneal length during deformation is very small, approximately 1% of its original length. Parameter (3) enables to determine the applanation points with a correlation of 92% compared to the conventional method for calculating corneal flattening areas. The proposed algorithm provides reproducible results fully automatically within a few seconds/per patient using Core i7 processor.
conclusionsUsing the proposed algorithm, it is possible to measure new, additional parameters of corneal deformation, which are not available in the original software. The presented analysis method provides three new parameters of the corneal reaction. Detailed clinical studies based on this method will be presented in subsequent papers.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.