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Mariana Harasawa, Guillermo Salcedo, Miguel Paciuc-Beja, Marc T Mathias, Raul Velez-Montoya, Jeffrey L Olson, Scott C Oliver, Naresh Mandava, Hugo Quiroz-Mercado; Spectral Domain Optical Coherence Tomographic Analysis Of The Ocular Equator. Invest. Ophthalmol. Vis. Sci. 2014;55(13):3394.
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To analyze and describe the external layers of normal eyes with spectral domain optical coherence tomography (SD-OCT) performed approximately at the ocular equator.
Retrospective, observational and descriptive analysis of ten eyes of 10 healthy ocular patients. 6 mm anterior segment SD-OCT scans were performed in three locations: 1: at the corneo-scleral limbus, with the limbus in the middle of the scan, visualizing cornea and esclera; 2: posterior to the border of the corneo-scleral limbus; 3, approximately at 5 mm off the limbus, with the scan directed posteriorly. Scans were performed at the nasal and temporal sides of each eye (3 and 9 o’clock meridians). Findings were observed and described.
Visualization of the following structures was accurately performed: conjuntiva, Tenon’s capsule, extra-ocular muscles, and sclera. After correct identification of the layers, thickness measurement was performed with the manual caliper software. Histopathology correlation was done as a comparison to identify each structure.
Ab-externo, in vivo analysis with SD-OCT of outer ocular layers can be correctly performed. SD-OCT can be used to accurately identify and evaluate the conjuntiva, insertion of extra-ocular muscles and characteristics of the sclera.
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