A method of measuring anterior chamber volume using the anterior segment optical coherence tomographer and specialized software.
OBJECTIVE
To describe and evaluate a new method for measuring anterior chamber volume (ACV).


METHODS
Observational case series.


METHODS
The authors measured ACV using the anterior chamber (AC) optical coherence tomographer (OCT) and applied image-processing software developed by them. Repeatability was evaluated. The ACV was measured in patient groups with normal ACs, shallow ACs, and deep ACs. The volume difference before and after laser peripheral iridotomy (LPI) was analyzed for the shallow and deep groups.


RESULTS
Coefficients of repeatability for intraoperator, interoperator, and interimage measurements were 0.406%, 0.958%, and 0.851%, respectively. The limits of agreement for intraoperator and interoperator measurement were -0.911 microl to 1.343 microl and -7.875 microl to -2.463 microl, respectively. There were significant ACV differences in normal, shallow, and deep AC eyes (P < .001) and before and after LPI in shallow AC (P < .001) and deep AC (P = .008) eyes.


CONCLUSIONS
The ACV values obtained by this method were repeatable and in accord with clinical observation.
Wang
Ningli
N
Tongren Ophthalmic Center, Beijing Tongren Hospital, Capital University of Medical Sciences, Beijing, China. wbsod@vip.sina.com
Wang
Bingsong
B
Zhai
Gaoshou
G
Lei
Kun
K
Wang
Lan
L
Congdon
Nathan
N
D000328:Adult; D000368:Aged; D000867:Anterior Chamber / Q000473:pathology*; D015812:Glaucoma, Angle-Closure / Q000150:complications / Q000601:surgery; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D032801:Iridectomy; D007498:Iris / Q000473:pathology / Q000601:surgery; D053685:Laser Therapy; D008875:Middle Aged; D047728:Myopia, Degenerative / Q000150:complications / Q000601:surgery; D015588:Observer Variation; D015203:Reproducibility of Results; D012984:Software; D041623:Tomography, Optical Coherence / Q000379:methods*