1. Articles from Bartlomiej J. Kaluzny

    1-11 of 11

    1. Air-Puff-Induced Dynamics of Ocular Components Measured with Optical Biometry

      Explore IOVS Journal Ophthalmology
      Air-Puff-Induced Dynamics of Ocular Components Measured with Optical Biometry

      Purpose : To analyze the dynamics of all optical components of the eye and the behavior of the eyeball under air-puff conditions in vivo. To determine the impact of the intraocular pressure (IOP) on the air-puff-induced deformation of the eye. Methods : Twenty eyes of 20 healthy subjects were included in this study. The dynamics of the ocular components, such as the cornea, the crystalline lens, and the retina, was measured by a prototype swept source optical coherence tomography biometer integrated with the air-puff system. The system allows to acquire a series of axial scans at the same location as a function ...

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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Bartlomiej J. Kaluzny

    2. Tear Meniscus Measurement by Spectral Optical Coherence Tomography

      Explore LWW Online Ophthalmology
      Tear Meniscus Measurement by Spectral Optical Coherence Tomography

      Purpose. To evaluate the use of lower tear meniscus measurements obtained with anterior segment Spectral Optical Coherence Tomography (OCT) in quantitative tear evaluation and diagnosis of dry eye syndrome. To verify sensitivity and specificity of different tear meniscus parameters in diagnosis of dry eye syndrome. Methods. A total of 111 eyes in consecutive patients, mean age 34.35 years (SD, 11.17), were enrolled. Each patient completed a standard Ocular Surface Disease Index questionnaire and general ophthalmic examination. Lower tear meniscus was evaluated using Spectral OCT (RTVue, Optovue) with cornea-anterior segment lens short. Three parameters were measured: tear meniscus cross-section ...

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      Mentions: Optovue Bartlomiej J. Kaluzny

    3. Feature Of The Week 11/6/11: Nicolaus Copernicus University Researchers Develop Technique to Study Biomechanical Properties of The Cornea Using OCT

      Explore Optical Coherence Tomography News Ophthalmology
      Feature Of The Week 11/6/11: Nicolaus Copernicus University Researchers Develop Technique to Study Biomechanical Properties of The Cornea Using OCT
      Researchers from Nicolaus Copernicus University have a long history of development of OCT in general and ophthalmology in particular. Recently NCU developed a technique to study the mechanical dynamics of the cornea using high speed OCT combined with an air puff system. Below is a summary of their work.We present a novel method and instrument for in vivo imaging and measurement of the human corneal dynamics during an air puff. The instrument is based on high-speed swept source optical coherence tomography (ssOCT) combined with a custom adapted air puff chamber from a non-contact tonometer, which uses an air stream ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Andrzej A. Kowalczyk

    4. Corneal topography with high-speed swept source OCT in clinical examination

      Explore opticsinfobase.org Ophthalmology
      Corneal topography with high-speed swept source OCT in clinical examination
      We present the applicability of high-speed swept source (SS) optical coherence tomography (OCT) for quantitative evaluation of the corneal topography. A high-speed OCT device of 108,000 lines/s permits dense 3D imaging of the anterior segment within a time period of less than one fourth of second, minimizing the influence of motion artifacts on final images and topographic analysis. The swept laser performance was specially adapted to meet imaging depth requirements. For the first time to our knowledge the results of a quantitative corneal analysis based on SS OCT for clinical pathologies such as keratoconus, a cornea with superficial ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Maciej Szkulmowski

    5. Assessment of corneal dynamics with high-speed swept source Optical Coherence Tomography combined with an air puff system

      Explore opticsinfobase.org Ophthalmology
      Assessment of corneal dynamics with high-speed swept source Optical Coherence Tomography combined with an air puff system
      We present a novel method and instrument for in vivo imaging and measurement of the human corneal dynamics during an air puff. The instrument is based on high-speed swept source optical coherence tomography (ssOCT) combined with a custom adapted air puff chamber from a non-contact tonometer, which uses an air stream to deform the cornea in a non-invasive manner. During the short period of time that the deformation takes place, the ssOCT acquires multiple A-scans in time (M-scan) at the center of the air puff, allowing observation of the dynamics of the anterior and posterior corneal surfaces as well as ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Andrzej A. Kowalczyk

    6. Imaging of the lens capsule with an ultrahigh-resolution spectral optical coherence tomography prototype based on a femtosecond laser

      Explore BJO Online Ophthalmology
      Aim To demonstrate the applicability of ultrahigh-speed, ultrahigh-resolution spectral optical coherence tomography (SOCT) to cross-sectional imaging of the capsular bag in vivo. Methods The ultrahigh-speed and ultrahigh-resolution SOCT prototype was designed and constructed at Nicolaus Copernicus University (Torun, Poland). To obtain an ultrahigh speed up to 100 000 lines/s a new spectrometer with fast CMOS line-scan camera was built. A femtosecond laser with a central wavelength of 780 nm and =160 nm enabled imaging with an axial resolution of 2.3 µm and lateral resolution of 10 µm in tissue. Lens capsules of two healthy eyes were examined with ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Andrzej A. Kowalczyk

    7. Ultra high-speed swept source OCT imaging of the anterior segment of human eye at 200 kHz with adjustable imaging range

      Explore opticsinfobase.org Ophthalmology , Tunable Sources
      Ultra high-speed swept source OCT imaging of the anterior segment of human eye at 200 kHz with adjustable imaging range
      We present an application of in vivo anterior segment imaging of the human eye with an ultrahigh speed swept source OCT instrument. For this purpose, a dedicated OCT system was designed and constructed. This instrument enables axial zooming by automatic reconfiguration of spectral sweep range; an enhanced imaging range mode enables imaging of the entire anterior segment while a high axial resolution mode provides detailed morphological information of the chamber angle and the cornea. The speed of 200,000 lines/s enables high sampling density in three-dimensional imaging of the entire cornea in 250 ms promising future applications of OCT ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Andrzej A. Kowalczyk

    8. Fuchs’ Endothelial Dystrophy in 830-nm Spectral Domain Optical Coherence Tomography

      Explore Ophthalmic Surgery, Lasers and Imaging Ophthalmology
      This article presents for the first time the potential of 830-nm spectral domain optical coherence tomography (SD-OCT) in the evaluation of Fuchs’ endothelial dystrophy. SD-OCT is an imaging technique that can be used for in vivo cross-sectional corneal visualization. The important features of SD-OCT instruments include improved sensitivity and short acquisition time, which improves the quality of the tomograms compared with conventional time domain OCT. Tomograms of the corneas of three patients in different stages of Fuchs’ endothelial dystrophy are presented. The authors conclude that 830-nm SDOCT provides clinically valuable cross-sectional assessment of pathomorphological changes in Fuchs’ endothelial dystrophy in ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Andrzej A. Kowalczyk

    10. Spectral Optical Coherence Tomography in Video-Rate and 3D Imaging of Contact Lens Wear

      Explore Optometry and Vision Science Ophthalmology
      Optometry & Vision Science. 84(12):E1104-E1109, December 2007. KALUZNY, BARTLOMIEJ J. MD, PhD; FOJT, WOJCIECH Dipl Ing; SZKULMOWSKA, ANNA MSc; BAJRASZEWSKI, TOMASZ MSc; WOJTKOWSKI, MACIEJ PhD; KOWALCZYK, ANDRZEJ PhD Abstract: Purpose. To present the applicability of spectral optical coherence tomography (SOCT) for video-rate and three-dimensional imaging of a contact lens on the eye surface. Methods. The SOCT prototype instrument constructed at Nicolaus Copernicus University (Torun, Poland) is b
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      Mentions: Nicolaus Copernicus University Andrzej A. Kowalczyk Tomasz Bajraszewski

    11. Mapping of photoreceptor dysfunction using high resolution three-dimensional spectral optical coherence tomography

      Explore SPIE Digital Library Ophthalmology
      B. L. Sikorski, M. Szkulmowski, J. J. Kaluzny et al. The ability to obtain reliable information on functional status of photoreceptor layer is essential for assessing vision impairment in patients with macular diseases. The reconstruction of three-dimensional retinal structure in vivo using Spectral Optical Coherence Tomography (Spectral OCT) became p ... [Proc. SPIE Int. Soc. Opt. Eng. 6844, 68440J (2008)] published Mon Feb 11, 2008.
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      Mentions: Maciej Wojtkowski Andrzej A. Kowalczyk Tomasz Bajraszewski
    1-11 of 11
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    1. (11 articles) Bartlomiej J. Kaluzny
    2. (9 articles) Nicolaus Copernicus University
    3. (9 articles) Maciej Wojtkowski
    4. (8 articles) Andrzej A. Kowalczyk
    5. (6 articles) Maciej Szkulmowski
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    Ultra high-speed swept source OCT imaging of the anterior segment of human eye at 200 kHz with adjustable imaging range Assessment of corneal dynamics with high-speed swept source Optical Coherence Tomography combined with an air puff system Corneal topography with high-speed swept source OCT in clinical examination Feature Of The Week 11/6/11: Nicolaus Copernicus University Researchers Develop Technique to Study Biomechanical Properties of The Cornea Using OCT Tear Meniscus Measurement by Spectral Optical Coherence Tomography Full-range space-division multiplexing optical coherence tomography angiography Measuring 3D Optic Nerve Head Deformations using Digital Volume Correlation of in vivo Optical Coherence Tomography Data (Thesis) Optical coherence tomography for characterization of nanocomposite materials (Thesis) In Vivo Corneal Microstructural Changes in Herpetic Stromal Keratitis: A Spectral-Domain Optical Coherence Tomography Analysis Non-invasive optical screening of Streptococcus Pneumonia based inflammatory changes of the tympanic membrane and mastoid mucosa in guinea pig otitis media using optical coherence tomography Visual function tests including the role of optical coherence tomography in neurofibromatosis Strain and elasticity imaging in compression optical coherence elastography: the two‐decade perspective and recent advances