Narrow- and open-angle measurements with anterior-segment optical coherence tomography and Pentacam™.
OBJECTIVE
To assess the agreement of the Pentacam (Oculus, Wetzlar, Germany) and anterior-segment optical coherence tomography (AS-OCT) in measuring open and narrow angles.


METHODS
Prospective observational case series in which 39 healthy normal subjects (39 eyes) and 25 patients with narrow angles (37 eyes) were enrolled between May and September 2008. The anterior chamber measurements were performed by AS-OCT and the Pentacam.


RESULTS
There was no significant difference in the open-angle measurements between the Pentacam and AS-OCT (P > .05). However, in patients with narrow angles, the average values of nasal and temporal anterior chamber angles taken by the Pentacam were larger than those of AS-OCT (25.5° ± 5.66° and 25.77° ± 5.15° vs 13.40° ± 6.81° and 12.13° ± 6.47°; P < .001).


CONCLUSIONS
Both AS-OCT and the Pentacam can reliably measure anterior chamber angles in healthy normal subjects. The difference in measuring narrow angles by the two instruments was due to inability to view the angle recess or the scleral spur with the Pentacam.
Dapeng
D
Mou
Jing
J
Fu
Shuning
S
Li
Lan
L
Wang
Xiaozhen
X
Wang
Gewei
G
Wu
Guoping
G
Qing
Yi
Y
Peng
Ningli
N
Wang
D000328:Adult; D000867:Anterior Chamber / Q000000981:diagnostic imaging* / Q000473:pathology*; D000869:Anterior Eye Segment / Q000000981:diagnostic imaging / Q000473:pathology; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D009666:Nose; D011446:Prospective Studies; D012016:Reference Values; D015203:Reproducibility of Results; D013701:Temporal Bone; D041623:Tomography, Optical Coherence; D014463:Ultrasonography; D055815:Young Adult