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Título: | Optical coherence tomography based estimates of crystalline lens volume, equatorial diameter, and plane position |
Autor: | Martínez-Enríquez, Eduardo CSIC ORCID; Sun, M. CSIC; Velasco Ocaña, Miriam CSIC; Birkenfeld, J. CSIC; Pérez Merino, Pablo CSIC ORCID; Marcos, Susana CSIC ORCID | Palabras clave: | Lens Optical coherence tomography Cataract surgery |
Fecha de publicación: | sep-2016 | Editor: | Association for Research in Vision and Ophthalmology | Citación: | Investigative ophthalmology & visual science 57: OCT600-OCT610 (2016) | Resumen: | PURPOSE. Measurement of crystalline lens geometry in vivo is critical to optimize performance of state-of-the-art cataract surgery. We used custom-developed quantitative anterior segment optical coherence tomography (OCT) and developed dedicated algorithms to estimate lens volume (VOL), equatorial diameter (DIA), and equatorial plane position (EPP). METHODS. The method was validated ex vivo in 27 human donor (19-71 years of age) lenses, which were imaged in three-dimensions by OCT. In vivo conditions were simulated assuming that only the information within a given pupil size (PS) was available. A parametric model was used to estimate the whole lens shape from PS-limited data. The accuracy of the estimated lens VOL, DIA, and EPP was evaluated by comparing estimates from the whole lens data and PS-limited data ex vivo. The method was demonstrated in vivo using 2 young eyes during accommodation and 2 cataract eyes. RESULTS. Crystalline lens VOL was estimated within 96% accuracy (average estimation error across lenses ± standard deviation: 9.30 ± 7.49 mm). Average estimation errors in EPP were below 40 ± 32 lm, and below 0.26 ± 0.22 mm in DIA. Changes in lens VOL with accommodation were not statistically significant (2-way ANOVA, P = 0.35). In young eyes, DIA decreased and EPP increased statistically significantly with accommodation (P < 0.001) by 0.14 mm and 0.13 mm, respectively, on average across subjects. In cataract eyes, VOL = 205.5 mm3, DIA = 9.57 mm, and EPP = 2.15 mm on average. CONCLUSIONS. Quantitative OCT with dedicated image processing algorithms allows estimation of human crystalline lens volume, diameter, and equatorial lens position, as validated from ex vivo measurements, where entire lens images are available. | Descripción: | 11 págs.; 8 figs. ; Open Access funded by Creative Commons Atribution Licence 4.0 | Versión del editor: | http://doi.org/10.1167/IOVS.15-18933 | URI: | http://hdl.handle.net/10261/149606 | DOI: | 10.1167/IOVS.15-18933 | Identificadores: | doi: 10.1167/IOVS.15-18933 issn: 1552-5783 |
Aparece en las colecciones: | (CFMAC-IO) Artículos |
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