J Korean Ophthalmol Soc.  2006 Jan;47(1):97-104.

Quantified Values of Anterior Chamber Depth and Angle Measurements Using Ultrasound Biomicroscopy and Topography

• Jea SY
• Jung SC
• Oum BS

Abstract

PURPOSE: To compare the measured values of anterior chamber depth and angle in glaucoma patients using Ultrasound Biomicroscopy (UBM) and Orbscan(TM) IIz Topography.
METHODS
We measured the anterior chamber depth and angles of four directions in 26 eyes of 13 primary open angle glaucoma (POAG) patients, 26 eyes of 13 normal tension glaucoma (NTG) patients, and 20 eyes of 10 angle closure glaucoma (ACG) patients, with UBM and Orbscan.
RESULTS
The values of anterior chamber depth did not show any difference between UBM and Orbscan. The values for anterior chamber angle in POAG and NTG eyes were not different between UBM and Orbscan, but the values for all anterior chamber angles except the superior angle, measured with UBM were significantly larger than those for ACG measured by Orbscan.
CONCLUSIONS
Both UBM and Orbscan showed similar results in the measurement of anterior chamber depth and angle in POAG and NTG patients, but showed different results in the anterior chamber angle for ACG patients. UBM will be more useful in evaluating the anterior chamber angle in ACG patients because it can assess the structures of the anterior chamber angle objectively.

Keyword

Anterior chamber angle; Anterior chamber depth; Orbscan(TM) IIz; Ultrasound Biomicroscopy

MeSH Terms

Anterior Chamber*
Glaucoma
Glaucoma, Angle-Closure
Glaucoma, Open-Angle
Humans
Low Tension Glaucoma
Microscopy, Acoustic*
Ultrasonography*