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Anterior segment imaging with fourier‐domain optical coherence tomography system compared to time‐domain OCT
Author(s) -
NOWINSKA A,
WYLEGALA E,
MILKA M,
MANKOWSKI W
Publication year - 2008
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.1755-3768.2008.4236.x
Subject(s) - optical coherence tomography , fourier domain , ophthalmology , anterior chamber angle , medicine , optics , glaucoma , physics
Purpose To compare anterior segment measurements and morphology obtained from two anterior segment optical coherence tomography systems Methods 30 eyes of 30 healthy volunteers were recruited for the study. Central corneal thickness (CCT), trabecular‐iris angle (TIA) and angle opening distance (AOD 500) at the nasal and temporal angles were measured three times during one visit with two systems: Visante OCT (Carl Zeiss Meditec, Inc, Dublin, California, USA) and RTVue FD‐OCT Corneal Anterior Module system (Optovue, Inc. Fremont, CA, USC). Anterior segment morphology was assessed and compared. Results Mean values of CCT, TIA and AOD by Visante OCT and RTVue FD‐OCT were as follows: automatic CCT 535 ± 33,07 μm, 538 ± 31,82 μm; manual CCT 545 ± 30,91 μm, 542 ± 30,57 μm; nasal TIA 34,7± 9,5, 35,2 ± 8,9; temporal TIA 35,3 ± 8,5, 35,5 ± 9; nasal AOD 435 ± 95 μm, 444 ± 98 μm; temporal AOD 443 ± 103 μm, 452 ± 99 μm. There was no significant difference between mean values and they were highly correlated. Morphologic analysis of two OCT systems proved that Visante OCT has lower resolution, but in one anterior chamber image, all the anterior chamber structures are visible, while RTVue provides very precise information about small fragments of anterior chamber. Conclusion RTVue FD‐OCT provides accurate anterior segment parameters measurements and shows agreement wit OCT Visante.