All Articles from Oliver Findl -Optical Coherence Tomography News

Articles from Oliver Findl

1-21 of 21
1. Diagnostic Reliability of Optical Coherence Tomography Biomarkers for Postsurgical Success in Visual Acuity in Patients with Idiopathic Epiretinal Membranes
  
  Explore thieme-connect.de Apr 17 2022 Ophthalmology
  
  Introduction: Several optical coherence tomography (OCT) biomarkers for postsurgical success in patients with idiopathic epiretinal membranes (iERMs) have been described in single predictor analyses. The aim of this study was to assess the reliability of diagnosis of OCT biomarkers and to calculate their impact on postsurgical visual acuity by applying multiple regression analysis. Methods: This retrospective study included patients scheduled for pars plana vitrectomy with membrane peeling for iERMs. Presurgical OCT scans were analyzed for the presence of OCT biomarkers by two reviewers. Intra- and interobserver reliability was calculated with the Kuder-Richardson 20 test. Results: Among the 136 patients included ...
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2. Digital ocular swept source optical coherence aberrometry
  
  Explore OSA | OSA Publishing Oct 16 2021 Ophthalmology
  
  Ocular aberrometry is an essential technique in vision science and ophthalmology. We demonstrate how a phase-sensitive single mode fiber-based swept source optical coherence tomography (SS-OCT) setup can be employed for quantitative ocular aberrometry with digital adaptive optics (DAO). The system records the volumetric point spread function at the retina in a de-scanning geometry using a guide star pencil beam. Succeeding test-retest repeatability assessment with defocus and astigmatism analysis on a model eye within ± 3 D dynamic range, the feasibility of technique is demonstrated in-vivo at a B-scan rate of >1 kHz in comparison with a commercially available aberrometer.
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  Mentions: Medical University of Vienna
3. Evaluation of intra-operative aphakic axial eye length measurements using swept source optical coherence tomography
  
  Explore LWW Online Sep 8 2021 Ophthalmology
  
  Purpose: Evaluation of intra-operative aphakic axial eye length (AL) measurements using swept source optical coherence tomography. Setting: Hanusch Hospital, Vienna, Austria. Design: Prospective single-center study. Methods: Patients scheduled for cataract surgery were measured using swept-source optical coherence tomography (ss-OCT, IOLMaster 700, Carl Zeiss Meditec AG, Jena, Germany) to assess the axial eye length. Intra-operatively, swept source optical coherence tomography (ss-OCT) measurements were performed with a prototype device (IOLMaster 700 connected to an OPMI Lumera 700 microscope, CZM) at the beginning of cataract surgery furthermore of the aphakic eye and 2 months after surgery. Results: Of the 59 eyes of 59 ...
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  Mentions: Carl Zeiss Meditec
4. Intraoperative optical coherence tomography guided corneal sweeping for removal of remnant Interface fluid during ultra-thin Descemet stripping automated endothelial keratoplasty
  
  Explore BMC Ophthalmology Apr 16 2021 Ophthalmology
  
  Background Remnant interface fluid following Descemet stripping automated endothelial keratoplasty (DSAEK) is associated with postoperative detachments. The aim of this study was to assess outcomes of intraoperative optical coherence tomography (iOCT) guided meticulous peripheral corneal sweeping for removal of interface fluid during ultra-thin (UT) DSAEK. Methods This retrospective study included all eyes underwent iOCT guided UT-DSAEK from October 2016 to February 2018 at the Hanusch Hospital, Vienna, Austria. Peripheral meticulous corneal sweeping was performed to remove excess fluid. Central graft thickness (CGT) was measured prior to surgery, after graft bubbling and after corneal sweeping. Remnant interface fluid rates were compared ...
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  Mentions: University of Toronto
5. Repeatability of two swept-source optical coherence tomography biometers and one optical low coherence reflectometry biometer
  
  Explore LWW Online Mar 23 2021 Ophthalmology
  
  Aim: To compare the repeatability of two swept-source optical coherence tomography biometers (ss-OCT), IOLMaster 700 (biometer A, Carl Zeiss Meditec AG), and ANTERION (biometer B, Heidelberg Engineering GmbH) and one optical low-coherence reflectometry device (OLCR) (Lenstar, LS900, Haag-Streit AG). Setting: Vienna Institute for Research in Ocular Surgery – Karl Landsteiner Institute, Hanusch Hospital, Department of Ophthalmology, Vienna, Austria Design: Prospective study that included patients scheduled for cataract surgery. Method: Three consecutive measurements were performed with two ss-OCT devices and one OLCR device. The repeatability of the following biometry variables was compared: keratometry, central corneal thickness (CCT), anterior chamber depth (ACD), lens ...
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  Mentions: Carl Zeiss Meditec Haag-Streit
6. Comparison of two swept-source optical coherence tomography-based biometry devices
  
  Explore journals.elsevier.com Aug 10 2020 Ophthalmology
  
  Purpose: To compare two swept-source optical coherence tomography (SS-OCT) biometers, IOLMaster 700 (biometer A, Carl Zeiss Meditec AG), and ANTERION (biometer B, Heidelberg Engineering GmbH). Setting: Vienna Institute for Research in Ocular Surgery – Karl Landsteiner Institute, Hanusch Hospital, Department of Ophthalmology, Vienna, Austria. Design: Retrospective study. Method: Cataract patient biometric measurements performed between June and July 2019 were reviewed. Patients scheduled for cataract surgery were measured with both SS-OCT devices on the same day. The following biometry parameters were compared: keratometry, central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT) and axial length (AL). Result: In total, 389 ...
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  Mentions: Heidelberg Engineering Carl Zeiss Meditec
7. A comparative analysis of two swept-source optical coherence tomography biometers
  
  Explore Journal of Cataract & Refractive Surgery Mar 23 2019 Ophthalmology
  
  Purpose To report the level of agreement, repeatability and correlation of two swept-source optical coherence tomography (SS-OCT) biometers, the IOLMaster 700 (Carl Zeiss Meditec AG, Germany) (reference biometer) and the Argos (Movu, Inc.) (new biometer), in terms of axial length (AL), keratometric mean (mean K), central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT) and corneal diameter (CD). Setting Moorfields Eye Hospital NHS Foundation Trust, London, United Kingdom. Design Retrospective, comparative case-series. Methods Each participant underwent SS-OCT biometry with the reference and new biometer. In addition to reporting the statistical results derived from both eyes, this study included ...
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  Mentions: Carl Zeiss Meditec Movu
8. Cataract quantification using swept-source optical coherence tomography
  
  Explore Journal of Cataract & Refractive Surgery Nov 1 2018 Ophthalmology
  
  Purpose To develop and evaluate a cataract quantification method using a swept-source optical coherence tomography (SS-OCT) device (IOLMaster 700). Setting Hanusch Hospital, Vienna, Austria. Design Prospective multicenter case series. Methods This study included patients with cataract in at least 1 eye. Two independent examiners performed Lens Opacities Classification System II (LOCS II) grading at the slitlamp independently. Corrected distance visual acuity, contrast sensitivity, and SS-OCT measurements were also performed. In addition, the phacoemulsification energy and time were recorded. To develop an objective SS-OCT-based cataract quantification system, all SS-OCT scans were segmented and the local pixel intensity unit of the lens ...
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9. Intraoperative optical coherence tomography measurements of aphakic eyes to predict postoperative position of 2 intraocular lens designs
  
  Explore Journal of Cataract & Refractive Surgery Sep 12 2018 Ophthalmology
  
  Purpose To evaluate intraoperative anterior chamber depth (ACD) measurements of the aphakic eye to predict the postoperative ACD and compare 2 intraocular lens (IOL) designs. Setting Hanusch Hospital, Vienna, Austria. Design Prospective study. Methods In this prospective study, patients scheduled for cataract surgery received a plate-haptic IOL (Asphina, Carl Zeiss Meditec AG) or an open-loop haptic IOL (ZCB00, Johnson & Johnson). Preoperatively, optical biometry (IOLMaster 700, CZM, or Lenstar, Haag-Streit) was performed. Intraoperatively, a prototype setup was used to perform time-domain OCT scans of the anterior eye segment (Visante connected to OPMI Lumera 200, both CZM). The intraoperative ACD was measured ...
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10. Prediction of postoperative intraocular lens tilt using swept-source optical coherence tomography
  
  Explore Journal of Cataract & Refractive Surgery Jun 1 2017 Ophthalmology
  
  Purpose To compare crystalline lens tilt in eyes before and intraocular lens (IOL) tilt in eyes after cataract surgery using swept-source optical coherence tomography (SS-OCT) (IOLMaster 700). Setting Hanusch Hospital, Vienna, Austria. Design Prospective case series. Methods Patients' eyes were scanned 1 week before and 2 months after cataract surgery with IOL implantation using an SS-OCT device. This device performs B-scans along 6 meridians (0, 30, 60, 90, 120, and 150 degrees) to determine lens and IOL tilt. Results Sixty-two eyes (62 patients) were included in the analysis. The mean magnitude and direction of tilt showed mirror symmetry between both ...
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  Mentions: Carl Zeiss Meditec
11. Macular disease detection with a swept-source optical coherence tomography-based biometry device in patients scheduled for cataract surgery
  
  Explore Elsevier Health Oct 1 2016 Ophthalmology
  
  Purpose To assess the sensitivity and specificity for detecting macular disease with a new optical biometry device with swept-source optical coherence tomography (SS-OCT) used before cataract surgery. Setting Hanusch Hospital, Vienna, Austria. Design Consecutive case series. Methods This study included patients with or without macular disease. All patients were scanned using the new biometry device (IOLMaster 700), which allows a 1.0 mm central retinal scan using SS-OCT technology. Also, all eyes were assessed using a dedicated retinal OCT device (RTVue) on the same day. Two experienced examiners and 1 ophthalmology resident graded all scans individually. Sensitivity and specificity for ...
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  Mentions: Carl Zeiss Meditec
12. Key Developments for Partial Coherence Biometry and Optical Coherence Tomography in the Human Eye Made in Vienna
  
  Explore IOVS Journal Jul 17 2016 Ophthalmology
  
  Purpose : To describe key developments of optical biometry and optical coherence tomography (OCT) for ophthalmic applications made by one of the pioneering research groups. Methods : Partial coherence interferometry (PCI) as the basic ranging technology for modern optical biometry and for OCT was introduced for biomedical applications in the 1980s. Later, Fourier domain (FD) OCT was introduced and demonstrated to provide superior sensitivity as compared to time domain OCT. Further developments comprised ultrahigh-resolution OCT and deep-penetration OCT at wavelengths of approximately 1050 nm. Important functional extensions comprise Doppler OCT/OCT angiography, polarization-sensitive OCT, and adaptive optics OCT. Results : High-precision PCI biometry ...
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  Mentions: Medical University of Vienna
13. Using continuous intraoperative optical coherence tomography to classify swirling lens fragments during cataract surgery and to predict their impact on corneal endothelial cell damage
  
  Explore Elsevier Health Jul 1 2016 Ophthalmology
  
  Purpose To quantify and classify swirling lens fragments during cataract surgery and record their impact on the corneal endothelium using continuous intraoperative optical coherence tomography (OCT). Setting Vienna Institute for Ocular Surgery, Hanusch Hospital, Vienna, Austria. Design Prospective case series. Methods Patients scheduled for cataract surgery without other ophthalmologic comorbidities were included. During surgery, continuous OCT recordings were performed to measure and score swirling lens fragments that came into contact with the corneal endothelium. Endothelial cell density (ECD) was measured preoperatively and 1 month postoperatively. In addition, the central corneal thickness and aqueous flare were measured preoperatively and 1 hour ...
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14. Macular disease detection with a swept-source optical coherence tomography-based biometry device in patients scheduled for cataract surgery
  
  Explore ScienceDirect Apr 28 2016 Ophthalmology
  
  Purpose To assess the sensitivity and specificity for detecting macular disease with a new optical biometry device with swept-source optical coherence tomography (SS-OCT) used before cataract surgery. Setting Hanusch Hospital, Vienna, Austria. Design Consecutive case series. Methods This study included patients with or without macular disease. All patients were scanned using the new biometry device (IOLMaster 700), which allows a 1.0 mm central retinal scan using SS-OCT technology. Also, all eyes were assessed using a dedicated retinal OCT device (RTVue) on the same day. Two experienced examiners and 1 ophthalmology resident graded all scans individually. Sensitivity and specificity for ...
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15. Visualizing Macular Structures During Membrane Peeling Surgery With an Intraoperative Spectral-Domain Optical Coherence Tomography Device
  
  Explore Healio.com Apr 13 2016 Ophthalmology
  
  BACKGROUND AND OBJECTIVE: The aim of this study was to examine the quality of intraoperative visualization of the posterior hyaloid, epiretinal membrane (ERM), inner limiting membrane (ILM), and hyporeflective subfoveal zone with a commercially available, microscope-integrated spectral-domain OCT setup (mi-SD-OCT) (Rescan 700; Carl Zeiss Meditec AG, Germany). PATIENTS AND METHODS: Twenty patients prospectively scheduled for pars plana vitrectomy with membrane peeling due to an idiopathic ERM were included. Standard 23-gauge, three-port pars plana vitrectomy with membrane peeling and staining of the ERM with a trypan blue-based chromovitrectomy dye was performed in all cases. Intraoperative SD-OCT was performed before and after ...
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  Mentions: Carl Zeiss Meditec
16. Macular disease detection with a swept-source optical coherence tomography-based biometry device in patients scheduled for cataract surgery
  
  Explore Journal of Cataract & Refractive Surgery Apr 1 2016 Ophthalmology
  
  Purpose To assess the sensitivity and specificity for detecting macular disease with a new optical biometry device with swept-source optical coherence tomography (SS-OCT) used before cataract surgery. Setting Hanusch Hospital, Vienna, Austria. Design Consecutive case series. Methods This study included patients with or without macular disease. All patients were scanned using the new biometry device (IOLMaster 700), which allows a 1.0 mm central retinal scan using SS-OCT technology. Also, all eyes were assessed using a dedicated retinal OCT device (RTVue) on the same day. Two experienced examiners and 1 ophthalmology resident graded all scans individually. Sensitivity and specificity for ...
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17. Prediction of Residual Astigmatism After Cataract Surgery Using Swept Source Fourier Domain Optical Coherence Tomography
  
  Explore Informa Healthcare Oct 14 2014 Ophthalmology
  
  Purpose : To compare corneal measurements obtained by a swept source fourier domain OCT (CASIA SS-1000), an autokeratometer (Haag-Streit Lenstar), a hybrid topographer (Tomey TMS-5), a Placido topographer (Tomey TMS-5 in Placido mode) and a Scheimpflug tomographer (Oculus Pentacam) to manifest subjective refraction. Methods : One hundred and four pseudophacic patients with non-toric IOLs were measured at least 6 months after surgery . Corneal astigmatism as measured on the anterior corneal surface as well as total corneal astigmatism including posterior surface data was compared to manifest refractive cylinder (cross-cylinder strategy) by computing difference vectors and correlation analysis of power vectors. Results : The OCT ...
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  Mentions: Tomey Corporation Haag-Streit
18. Using continuous intraoperative optical coherence tomography measurements of the aphakic eye for intraocular lens power calculation
  
  Explore BJO Online Feb 11 2014 Ophthalmology
  
  Background/aims To include intraoperative measurements of the anterior lens capsule of the aphakic eye into the intraocular lens power calculation (IPC) process and to compare the refractive outcome with conventional IPC formulae. Methods In this prospective study, a prototype operating microscope with an integrated continuous optical coherence tomography (OCT) device (Visante attached to OPMI VISU 200, Carl Zeiss Meditec AG, Germany) was used to measure the anterior lens capsule position after implanting a capsular tension ring (CTR). Optical biometry (intraocular lens (IOL) Master 500) and ACMaster measurements (Carl Zeiss Meditec AG, Germany) were performed before surgery. Autorefraction and subjective ...
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  Mentions: Carl Zeiss Meditec
19. Predicting the Postoperative Intraocular Lens Position Using Continuous Intraoperative Optical Coherence Tomography Measurements
  
  Explore iovs.org Aug 6 2013 Ophthalmology
  
  Purpose. The aim of this study was to assess, if measuring the position of the lens capsule intraoperatively with a continuous intraoperative optical coherence tomography (OCT) device could be useful to improve the prediction of the intraocular lens (IOL) position. Methods. This prospective study included patients who were scheduled for cataract surgery. A prototype operating microscope with an integrated continuous OCT device was used to measure the anterior and posterior lens capsule position at different time points during cataract surgery. In all cases, a capsular tension ring (CTR) was used to tauten the lens capsule. Partial coherence interferometry was used ...
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20. Predicting the post-operative intraocular lens position using continuous intra-operative optical coherence tomography measurements
  
  Explore iovs.org Jun 14 2013 Ophthalmology
  
  Purpose: Aim of this study was to assess, if measuring the position of the lens capsule intra-operatively with a continuous intra-operative optical coherence tomography (OCT) device could be useful to improve the prediction of the IOL position. Methods: This prospective study included patients who were scheduled for cataract surgery. A prototype operating microscope with an integrated continuous OCT device (Visante attached to OPMI VISU 200, Carl Zeiss Meditec AG, Germany) was used to measure the anterior and posterior lens capsule position at different time points during cataract surgery. In all cases a capsular tension ring (CTR) was used to tauten ...
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  Mentions: Carl Zeiss Meditec
21. High sensitive measurement of the human axial eye length in vivo with Fourier domain low-coherence interferometry
  
  Explore opticsinfobase.org Feb 5 2008 Ophthalmology
  
  In this paper we present a system for intraocular distance measurement of the human eye in vivo with high sensitivity. The instrument is based on Fourier domain low coherence interferometry (FD-LCI). Stateof-the-art FD-LCI systems are limited to a depth range of only a few mm, because the depth range is determined by the spectral resolution of the spectrometer. To measure larger distances (e.g. human eye length) we implemented two separate reference arms with different arm lengths into the interferometer. Each reference arm length corresponds to a different depth position within the sample (e.g. cornea and retina). Therefore two ...
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  Mentions: Medical University of Vienna Carl Zeiss Meditec
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