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Lens thickness assessment : anterior segment optical coherence tomography versus a-scan ultrasonography

International Journal of Ophthalmology(English edition) 2015年第6期8卷 1151-1155页

作者： Nikoo Hamzeh Sasan Moghimi Golshan Latifi Massood Mohammadi Nassim Khatibi Shan C.Lin Tehran University of Medical Science Farabi Eye Hospital Koret Vision Center San Francisco Medical SchoolUniversity of California

AIMTo assess lens thickness measurements with anterior segment-optical coherence tomography (AS-OCT) in comparison with a-scan ultrasonography (A-scan US).METHODSThere were 218 adult subjects (218 eyes) aged 59.2±9.2y enrolled in this prospective cross-sectional study. Forty-three eyes had open angles and 175 eyes had narrow angles. Routine ophthalmic exam was performed and nuclear opacity was graded using the Lens Opacities Classification System III (LOCS III). Lens thickness was measured by AS-OCT (Visante OCT, Carl Zeiss Meditec, Dublin, CA, USA). The highest quality image was selected for each eye and lens thickness was calculated using ImageJ software. Lens thickness was also measured by A-scan *** correlations showed a value of 99.7% for intra-visit measurements and 95.3% for inter-visit measurements. The mean lens thickness measured by AS-OCT was not significantly different from that of A-scan US (4.861±0.404 vs 4.866±0.351 mm, P=0.74). Lens thickness values obtained from the two instruments were highly correlated overall (Pearson correlation coefficient=0.81, Pscan US in thicker lens (β=-0.29, Pscan US. It can be used as a reliable noncontact method for measuring lens thickness in adults with or without significant cataract.

关键词： lens thickness a-scan ultrasonography anterior segment-optical coherence tomography biometry cataract

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