1. Articles from Preeya K. Gupta

    1-4 of 4
    1. Comparison of agreement and efficiency of a swept source-optical coherence tomography device and an optical low-coherence reflectometry device for biometry measurements during cataract evaluation

      Comparison of agreement and efficiency of a swept source-optical coherence tomography device and an optical low-coherence reflectometry device for biometry measurements during cataract evaluation

      Purpose: To compare the agreement and efficiency of a swept source-optical coherence tomography biometer, IOLMaster 700 (IOLM700), and a low-coherence optical reflectometry biometer, LENSTAR LS 900 (LS900), when acquiring biometry measurements during cataract evaluation. Methods: A retrospective chart review of biometry measurements that were performed in 64 eyes of 32 patients on the same day using the LS900 and the IOLM700. The total image acquisition time per subject was compared between the two machines using a Wilcoxon rank-sum test. Bland–Altman plots showing the mean difference and 95% limits of agreement were graphed. Intraclass correlation coefficients (ICCs) were calculated for ...

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      Mentions: Duke University
    2. Evaluation of Clear Corneal Wound Dynamics With Contrast-Enhanced Spectral-Domain Optical Coherence Tomography

      Evaluation of Clear Corneal Wound Dynamics With Contrast-Enhanced Spectral-Domain Optical Coherence Tomography

      Please wait Close Window BACKGROUND AND OBJECTIVE:To evaluate wound morphology and integrity using contrast-enhanced spectral-domain optical coherence tomography (SD-OCT). PATIENTS AND METHODS:Eighteen patients (18 eyes) undergoing unilateral routine cataract surgery were enrolled. SD-OCT imaging of the corneal wound was performed immediately following cataract surgery and on postoperative day 1. A topical contrast agent, prednisolone acetate 1%, was used to help evaluate wound integrity. OCT features of the corneal incision and changes in wound interface reflectivity after administration of topical prednisolone acetate 1% were analyzed. Main outcome measures were quantitative and qualitative description of wound morphology and contrast enhancement ...

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    3. Differentiating Glaucomatous from Non-Glaucomatous Optic Nerve Cupping by Optical Coherence Tomography

      Differentiating Glaucomatous from Non-Glaucomatous Optic Nerve Cupping by Optical Coherence Tomography
      Abstract: Background: In clinical practice, the differentiation of glaucomatous from non-glaucomatous cupping can be difficult, even for experienced observers. The purpose of this study was to evaluate the role of optical coherence tomography (OCT) in differentiating glaucomatous from non-glaucomatous optic nerve cupping in a cross-sectional pilot study. Methods: Eleven consecutive patients presenting to the Duke Eye Center from September 2007 to July 2008 with nonglaucomatous optic nerve cupping and 12 patients with glaucomatous optic nerve cupping were identified. All patients underwent Stratus® OCT imaging: fast macular map, fast retinal nerve fiber layer (RNFL) 3.4 thickness, and fast optic disc ...
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    4. Evaluation of Contrast Agents for Enhanced Visualization in Optical Coherence Tomography

      Evaluation of Contrast Agents for Enhanced Visualization in Optical Coherence Tomography
      Purpose: To identify and evaluate the use of contrast agents in optical coherence tomography (OCT) for ophthalmic applications. Methods: Three agents [prednisolone acetate (PA), triamcinolone acetonide (TA), and lipid-based artificial tears (LBAT)] were tested in cadaveric porcine eyes imaged using hand-held spectral-domain OCT (SD-OCT). Anterior segment imaging was performed in triplicate with each agent at three sites [corneal epithelial surface, corneal wound interface, and anterior chamber (AC)]. OCT characteristics of the three agents at each ocular site were analyzed. Quantitative intensity (i.e., brightness) analysis was performed with ImageJ Software. IRB approval was obtained for imaging in human subjects undergoing ...
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    1-4 of 4
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    1. (4 articles) Duke University
    2. (2 articles) Justis P. Ehlers
    3. (1 articles) Jost B. Jonas
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    Evaluation of Contrast Agents for Enhanced Visualization in Optical Coherence Tomography Differentiating Glaucomatous from Non-Glaucomatous Optic Nerve Cupping by Optical Coherence Tomography Evaluation of Clear Corneal Wound Dynamics With Contrast-Enhanced Spectral-Domain Optical Coherence Tomography Comparison of agreement and efficiency of a swept source-optical coherence tomography device and an optical low-coherence reflectometry device for biometry measurements during cataract evaluation Optical coherence tomography features of neovascularization in proliferative diabetic retinopathy: a systematic review Retinal microvascular metrics in untreated essential hypertensives using optical coherence tomography angiography Optical coherence tomography angiography findings of fellow eye of proliferative macular telangiectasia type 2: Long term study Reorganization of the perifoveal microvasculature after macular hole closure assessed via optical coherence tomography angiography Optical coherence tomography angiography (OCTA) findings in Serpiginous Choroiditis Changes in retinal layer thickness with maturation in the dog: an in vivo spectral domain - optical coherence tomography imaging study Optical coherence tomography angiography analysis of fabry disease An unsupervised hierarchical approach for automatic intra‐retinal cyst segmentation in spectral‐domain optical coherence tomography images