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Comparaison of two anterior segment OCT: CASIA (Tomey) versus OCT Visante (Zeiss)
Author(s) -
GIMBERT A,
CAMPOLMI N,
THURET G,
GAIN P,
ROMANET JP,
CHIQUET C,
APTEL F
Publication year - 2013
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2013.t058.x
Subject(s) - repeatability , optical coherence tomography , ophthalmology , intraclass correlation , medicine , anterior chamber angle , glaucoma , nuclear medicine , mathematics , clinical psychology , statistics , psychometrics
Purpose To compare the anterior chamber (AC) and AC angle measurements obtained with a spectral‐domain and a time‐domain anterior segment optical coherence tomography (AS‐OCT), and to evaluate their repeatability Methods Prospective cross‐sectional study conducted on healthy subjects. The AC was imaged with a spectral‐domain (Casia SS‐100, Tomey) and a time‐domain AS‐OCT (Visante, Zeiss) in one eye of each patient in a random order. The central corneal thickness (CCT), anterior chamber depth (ACD), angle opening distance at 500 and 700 µm (AOD 500 and AOD 750), trabecular iris space area at 500 and 700 µm (TISA 500 and TISA 750) and scleral spur angle (SSA) were measured. The repeatability measurements were evaluated by the intraclass correlation coefficients (ICCs) Results 101 eyes of healthy subjects were analyzed. The repeatability was excellent with the Casia and the Visante for CCT (ICC 0.90‐0.94 and 0.95‐0.97), ACD (ICC 0.95‐0.98 and 0.93‐0.96), AOD 500 (ICC 0.92‐0.96 and 0.90‐0.94) and 750 (ICC 0.93‐0.96 and 0.91‐0.94), TISA 750 (ICC 0.81‐0.97 and 0.9‐0.94) and SSA (ICC 0.9‐0.94 and 0.89‐0.94), and moderate for TISA 500 (ICC 0.68‐0.97 and 0.7‐0.93). For all parameters, Casia and Visante measurements were significantly correlated (r 0.76‐0.98; p<0.002). Differences were non‐significant for CCT, AOD500 and 750, TISA 500 and 750. ACD measured with Casia was significantly larger than that measured with the Visante, and SSA measured with Casia was significantly lower than that measured with Visante Conclusion Both Casia and Visante AS‐OCTs demonstrate high repeatability. Excepted for the ACD and SSA, the two AS‐OCTs agree well in AC and AC angle measurements