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    1. En face optical coherence tomography imaging of beta and gamma parapapillary atrophy in high myopia

      En face optical coherence tomography imaging of beta and gamma parapapillary atrophy in high myopia

      Objective Recent studies have suggested that optical coherence tomography (OCT)-based classification of parapapillary atrophy (PPA) may be helpful in distinguishing glaucomatous from myopic optic disc changes. However, the pathological implications of PPA may be different in highly myopic eyes that exhibit optic disc deformations distinct from low to moderate myopia. Therefore, we conducted the current study to investigate factors associated with OCT-defined PPA zones measured in en face reconstructed swept source OCT (SS OCT) images in highly myopic eyes. Design Retrospective, cross-sectional study. Participants Seventy-seven eyes of 55 subjects with high myopia (spherical equivalent refractive error ≤ -8 diopters or ...

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    2. Gray Optic Disc Crescent: Evaluation of Anatomical Correlate by Spectral Domain Optical Coherence Tomography

      Gray Optic Disc Crescent: Evaluation of Anatomical Correlate by Spectral Domain Optical Coherence Tomography

      Purpose To test the hypothesis that the anatomical correlate of the gray optic disc crescent is pigmentation of externally oblique border tissue of Elschnig. Design Observational cross-sectional study. Participants African American adult males with or without clinically apparent gray optic disc crescents. Methods McNemar’s test for paired data and kappa statistic with 95% confidence intervals were used to examine the relationships between eyes with or without gray optic disc crescents and corresponding spectral domain-optical coherence tomography (SD-OCT) images with Enhanced Depth Imaging (EDI). Main Outcome Measures Correlation between clinical gray optic disc crescents and hyperreflectivity of externally oblique border ...

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