XXXX anterior chamber morphometry based on optical Scheimpflug images.

@entity1 @entity72360 @entity8707 @entity726 @entity2747
PURPOSE: To compare the performance of gonioscopy and noncontact morphometry with anterior chamber tomography (High Resolution Pentacam - HR) using optical Scheimpflug images in the evaluation of the anterior chamber angle (ACA). METHODS: Transversal study. 112 eyes from 74 subjects evaluated at the @entity726 Department, Fluminense Federal University, underwent gonioscopy and Pentacam HR. Using gonioscopy, the ACA was graded using the Shaffer Classification (SC) by a single experienced examiner masked to the Pentacam HR findings. @entity2747 was determined in eyes in which the posterior trabecular meshwork could not be seen in two or more quadrants on non-indentation gonioscopy (SC Grade 2 or less). Pentacam HR images of the nasal and temporal quadrants were evaluated by custom software to automatically obtain anterior chamber measurements, such as: anterior chamber angle (ACA), anterior chamber volume (ACV) and @entity8707 ( @entity8707 ). RESULTS: Based on gonioscopy results, 74 (60.07%) eyes of @entity1 classified as open-angle (SC 3 and 4) and 38 (33.93%) eyes of @entity1 classified as @entity2747 ( @entity72360 ). Noncontact morphometry with Scheimpflug images revealed a mean ACA of 39.20    5.31 degrees for open-angle and 21.18    7.98 degrees for @entity2747 . The open-angle group showed significant greater ACV and @entity8707 values when compared to @entity2747 (ACV of 193    36 mm   vs. 90    25 mm  , respectively, p<0.001; and @entity8707 of 3,09    0,42 mm vs. 1,55    0,64 mm, respectively, p<0.0001.). In screening eyes with open-angle and @entity2747 with the Pentacam ACA of 20   (SC Grade 2) using the ROC curves, the analysis showed 52.6% of sensitivity and 100% of specificity. CONCLUSIONS: The Pentacam showed ability in detecting eyes at risk for angle closure analyzing ACV and @entity8707 .
