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    1. Analysis of Retinochoroidal Vasculature in Underweight Women Using Optical Coherence Tomography Angiography

      Analysis of Retinochoroidal Vasculature in Underweight Women Using Optical Coherence Tomography Angiography

      Cachectic patients and controls undergoing a comprehensive ophthalmologic examination. The imaging of all subjects is undertaken using a commercial OCTA device with a scan rate of 70,000 A-scans/s, scan beam wavelength of 840 ± 10 nm and bandwidth of 45 nm. All measurements are performed between 10:00 and 12:00 on the same day. The OCTA images are independently graded and assessed by two retinal specialists. The software automatically segmented these full-thickness retinal scans into the superficial and deep inner retinal vascular plexuses, outer retina, and choriocapillaris (CC). The vascular density in the superficial and deep retinal vascular ...

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    2. Association Between Retinal Microvasculature and Optic Disc Alterations in Non-pathological High Myopia With OCTA

      Association Between Retinal Microvasculature and Optic Disc Alterations in Non-pathological High Myopia With OCTA

      Non-pathological high myopia patients and controls undergoing a comprehensive ophthalmologic examination are included. The Optical Coherence Tomography Angiography (OCTA) software automatically segments these full-thickness retinal scans into the superficial and deep inner retinal vascular plexuses, outer retina, and choriocapillaris (CC). The vascular density in the superficial and deep retinal vascular zones is calculated automatically by the software, and the foveal avascular zone (FAZ) and foveal density (FD) are also automatically determined. Choroidal thickness is calculated manually by two retinal specialists, and the average value was used.

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    3. AS OCT Evaluation for Perforated Punctual Plugs

      AS OCT Evaluation for Perforated Punctual Plugs

      Prospective non randomized case series study included 50 eyes. The study is conducted on patients attending to the oculoplastic unit of ophthalmology department of Minia university hospital. Informed consents were obtained from the participants in this study. The study was adherent to the tenets of declaration of Heleniski. Anterior segment optical coherence tomography (AS-OCT) was performed for the included patients after perforated plug implantation (during the first operative weak)

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    4. Bimodal and Coaxial High Resolution Ophthalmic Imaging

      Bimodal and Coaxial High Resolution Ophthalmic Imaging

      The knowledge of the pathogenesis of retinal affections, a major cause of blindness, has greatly benefited from recent advances in retinal imaging. However, optical aberrations of the ocular media limit the resolution that can be achieved by current techniques. The use of an adaptive optics system improves the resolution of ophthalmoscopes by several orders of magnitude, allowing the visualization of many retinal microstructures: photoreceptors, vessels, bundles of nerve fibers. Recently, the development of the coupling of the two main imaging techniques, the Adaptive Optics Ophthalmoscope with Optical Coherence Tomography , enables unparalleled three-dimensional in vivo cell-scale imaging, while remaining comfortable for ...

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    5. Optical Coherence Tomography in Patients With Radiotherapy for Head and Neck Cancer

      Optical Coherence Tomography in Patients With Radiotherapy for Head and Neck Cancer

      The purpose of this study is to determine whether any eventual skin damage caused by radiation therapy can be detected and monitored at a subclinical level via optical coherence tomography (OCT). Another key question is whether subclinical OCT detected skin damage correlates with acute and late clinical toxicity.

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    6. Photoaging Reversing After Picosecond Laser With DLA Assessed by Cellular Resolution OCT in Asian Patient With Melasma

      Photoaging Reversing After Picosecond Laser With DLA Assessed by Cellular Resolution OCT in Asian Patient With Melasma

      Background Melasma is a commonly acquired hypermelanosis that affects facial sun exposed areas, most commonly in Asians and other darker skin type females. Recent evidence has demonstrated melasma to be a photoaging disorder. The histological findings of melasma are similar to photoaging and include solar elastosis, increased mast cells and sebaceous glands, as well as increased vascularization. Pendulous active melanocytes with weakened basal membranes, and changes in nuclear morphology and chromatin texture of adjacent basal keratinocytes also seemed to be a characteristic feature of melasma.

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    7. Digital Wavefront Sensing

      Digital Wavefront Sensing

      H-OCT will be tested in this study for its suitability for the qualitative investigation of aberrometry. We aim to achieve a digital equivalent for wavefront calculation of the widespread analog procedure commonly used with conventional wavefront-aberrometers. The results will be compared with those from a conventional analog wavefront calculation method. In the course of this pilot study, 20 eyes of phakic and 10 eyes of pseudophakic subjects with suspected higher order aberrations will be examined using H-OCT

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    8. Assessment of Microcirculatory Dysfunction in Septic Shock Patients by OCTA

      Assessment of Microcirculatory Dysfunction in Septic Shock Patients by OCTA

      Purpose and rationale: Sepsis is a life-threatening organ dysfunction caused by a dysregulated host response to infection. Sepsis and septic shock are major public health problems killing one in every three patients. Microcirculatory dysfunction is frequent in septic shock. The duration and severity of this dysfunction have a prognostic impact by being associated with organ failure and mortality. Our study purposes to demonstrate the feasibility of optical coherence tomography angiography (OCTA) to improve assessment of microcirculatory dysfunction by showing that retinal and choroidal microcirculatory changes with prognostic impact are present during septic shock. Primary objective: To characterize the alterations of ...

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    9. Fantom Encore Sirolimus-eluting Bioresorbable Scaffold for Treatment of De-novo CAD: the ENCORE-I Study

      Fantom Encore Sirolimus-eluting Bioresorbable Scaffold for Treatment of De-novo CAD: the ENCORE-I Study

      Prospective, multicentre, non-randomized, investigator-initiated study aiming to assess the safety and efficacy of the Fantom Encore sirolimus-eluting bioresorbable scaffold (BRS). Up to 50 consecutive participants with de-novo non-complex obstructive coronary lesions and non-ST elevation acute coronay syndromes or stable angina pectoris will be included in the Netherlands and Belgium. Device performance and behaviour will be assessed by angiography and optical coherence tomography at the index procedure and at 13 months follow-up.

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    10. OCT Evaluation of Neurotrophic Ulcer Following Treatment With Oxervate

      OCT Evaluation of Neurotrophic Ulcer Following Treatment With Oxervate

      Neurotrophic keratitis (NK) is a condition where the cornea, or clear outer covering of the eye, has reduced sensation due to a variety of reasons. In more advanced cases of NK, the cornea can develop an area of thinning called an ulcer. The purpose of this research is to find out if Oxervate (cenegermin-bkbj 0.002%) an FDA-approved treatment for neurotrophic corneal ulcers leads to an increase in thickness of the corneal stroma (middle layer of the cornea) during and after treatment of a neurotrophic ulcer. Corneal thickness will be measured using optical coherence tomography (OCT), a non-contact imaging device ...

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      Mentions: FDA
    11. Scleral Lens Fitting Using Wide-Field OCT

      Scleral Lens Fitting Using Wide-Field OCT

      The purpose of this study is to see if OCT technology can optimize scleral contact lens fittings. Subjects with keratoconus, post-penetrating keratoplasty (PK), post-LASIK ectasia, post-radial keratotomy (RK), or a variety of anterior surface disorders requiring scleral lens fittings will be considered for enrollment. For each study eye, a clinically-selected scleral lens fit will be compared against an OCT-selected lens fit. The quality of each lens fit will be determined by flourescein exam at the slit lamp. Apical clearance, limbal clearance, conjunctival compression, and lens edge lift will be assessed. A lens that satisfies all four criteria will be considered ...

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    12. Study of Gastrointestinal Dysfunction and Enteric Neural Pathology in Patients With Parkinson's Disease

      Study of Gastrointestinal Dysfunction and Enteric Neural Pathology in Patients With Parkinson's Disease

      The purpose of this study is to establish the esophageal pathology findings as imaged with tethered capsule microscopy in subjects with Parkinson Disease. Images from patients with Parkinson disease will be compared to our previously obtained images in healthy subjects to establish the spectrum of esophageal pathologies occurring in patients with Parkinson disease by OCT imaging. In the case of imaging internal luminal organs, like the esophagus, OCT light is delivered via a long catheter. We have developed a new technique termed Tethered Capsule Endomicroscopy (TCE). TCE involves swallowing a tethered capsule that acquires cross-sectional microscopic images of the entire ...

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    13. Optical Imaging of Gastrointestinal Biopsy Samples and Their Correlation With Histology

      Optical Imaging of Gastrointestinal Biopsy Samples and Their Correlation With Histology

      The investigators have previously developed optical imaging systems that have been able to provide highly detailed images of tissue structures in multiple application areas including Cardiology, Gastroenterology, and Pulmonology. They are looking to continue the advancement of these various technologies under development. The population will include subjects who are undergoing elective esophagogastroduodenoscopy with biopsy, colonoscopy with biopsy, and/or endo-mucosal resection.The endoscopist will take no more than 3 biopsies in addition to the standard of care biopsies. The study will be optical imaging of the ex vivo GI specimens that are being collected. Specimens will be collected for research ...

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    14. Feasibility Study to Assess a Trans-nasal Intestinal Potential Difference Probe

      Feasibility Study to Assess a Trans-nasal Intestinal Potential Difference Probe

      Increased gastrointestinal (GI) permeability is associated to several GI conditions that affect millions of people worldwide. Healthy intestinal walls limit only specific molecules to cross into the body. "Leaky gut" is a condition of unregulated and increased gut permeability that allows unwanted antigens, pathogens and microbial toxins into the bloodstream(1). This in turn leads to a subsequent immune response that includes the production of inflammatory mediators. Leaky gut is a key feature in celiac disease, Crohn's disease, inflammatory bowel disease (IBD), and environmental enteropathy and have been associated with systemic diseases including type 1 diabetes, autoimmune hepatitis, and ...

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    15. Evaluation of Tethered Capsule Endomicroscopy as a Screening Tool for Barrett's Esophagus in the Primary Care Setting

      Evaluation of Tethered Capsule Endomicroscopy as a Screening Tool for Barrett's Esophagus in the Primary Care Setting

      The investigators have developed a tethered capsule OCT device intended as an inexpensive screening tool for BE. The capsule, which is attached to a thin, flexible tether, is reusable after being processed by a standard disinfection technique. Used without sedation, the capsule is swallowed by the participant and travels in the esophagus to the gastroesophageal junction (GEJ) via peristalsis. Cross-sectional microscopic OCT images of the entire esophagus are collected during transit. The total time needed for swallowing, imaging and retrieval does not exceed 10 minutes, with a total of 30 minutes for the procedure. The investigators have tested the feasibility ...

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    16. Vienna Preserflo Cohort Study

      Vienna Preserflo Cohort Study

      The Vienna Preserflo Microshunt Cohort Study is an observational study with a prospective postoperative examination in all glaucoma patients who had received a Preserflo Microshunt (PMS) as standalone procedure or in combination with cataract extraction in the time period between January and November 2019 at the Department of Ophthalmology, Medical University of Vienna. It is estimated that approximately 70 patients will be included of this cohort. The cohort will be invited for a prospective postoperative examination after 12 (±5) months of follow up. This examination shall comprise best corrected visual acuity, visual field test, intraocular pressure (IOP) measurement, slit lamp ...

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    1-24 of 279 1 2 3 4 ... 10 11 12 »
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