Applications of Scheimpflug Imaging in Glaucoma Management: Current and Potential Applications
Table 2
Comparison of anterior segment imaging modalities for assessing narrow angles.
Imaging system
Correlation with gonioscopy
Quantitative parameters
Advantages
Limitations
Slit scan topography
N/A
Iridocorneal angle ACD
Noncontact
No visualization of angle, ciliary body or sulcus
Rotational Scheimpflug camera
++
ACD ACV ACA
Noncontact
No visualization of angle, ciliary body or sulcus
ASOCT
+++
AOD500 TISA500
Noncontact Direct angle visualization Some visualization of ciliary body and sulcus
Requires identification of scleral spur Noncontact assessment limited to temporal and nasal angles
UBM
+++
ACD ACV ACA AOD500 TISA500
Excellent visualization of angle, ciliary body and sulcus
Requires contact, identification of scleral spur
ACD: anterior chamber depth, ACV: anterior chamber volume, ASOCT: anterior segment OCT, UBM: ultrasound biomicroscopy, AOD: angle opening distance, and TISA: trabecular iris area. N/A: not available, validating studies required. indicates that it may be as useful as ASOCT for partitioning narrow angles but it does not provide direct angle visualization.
