[Intraobserver reproducibility in anterior segment morphometry of normal eyes using ultrasound biomicroscopy (UBM)].
OBJECTIVE
To systematically study the anterior segment morphometric measurements by ultrasound biomicroscopy (UBM) in a large population of normal eyes, to evaluate their intra-observer reproducibility. Two new measurements are proposed and also tested concerning their intra-observer reproducibility.


METHODS
One hundred ninety eyes of 101 patients with normal ophthalmic examination were studied by UBM. Anterior chamber depth (ACD) along with 11 different morphometric parameters that characterize the anterior segment morphometry were measured in the superior, nasal, inferior and temporal meridians. All measurements were performed twice with a minimum interval of four weeks between them.


RESULTS
There were no statistical significant differences between the first (M1) and second (M2) measurements and regarding each studied parameter except for 2 variables in 2 meridians in the right eyes (OD) and 2 variables of one meridian in the left eyes (OS). Even in these cases, the largest difference between M1 and M2 was less than 0.006 mm, which was not clinically significant. The new tested parameters also presented a good intra-observer reproducibility.


CONCLUSIONS
This study confirmed the good intra-observer reproducibility of the variables that characterize anterior segment morphometry by UBM.
Souza Filho
Edmar C de
EC
Serviço de Galucoma, Hospital São Geraldo, Hospital das Clínicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG.
Marigo
Flávio de A
Fde A
Oliveira
Cristiano
C
Cronemberger
Sebastião
S
Calixto
Nassim
N
D000328:Adult; D000368:Aged; D000869:Anterior Eye Segment / Q000000981:diagnostic imaging* / Q000648:ultrastructure; D002924:Ciliary Body / Q000000981:diagnostic imaging / Q000648:ultrastructure; D003941:Diagnostic Techniques, Ophthalmological / Q000295:instrumentation; D005128:Eye Diseases / Q000000981:diagnostic imaging* / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D033401:Microscopy, Acoustic; D008875:Middle Aged; D015588:Observer Variation; D015203:Reproducibility of Results