Comparison of Visante and slit-lamp anterior segment optical coherence tomography in imaging the anterior chamber angle

Abstract

Aims To compare the diagnostic performance

Anterior segment optical coherence tomography of acute primary angle closure

“…Our results also imply that the risk for APAC increases from a group of eyes with normal anterior segment measurements to a group of eyes that have moderately shallow anterior chambers and contralateral eyes that have APAC, to a group of eyes with markedly shallow anterior chambers and APAC ( Table 5). The results of our study are also in agreement with recent studies showing that optical coherence tomography is able to image and measure the anterior chamber structure and dimensions in normal eyes and eyes with APAC in subjects of different ethnic background [24][25][26][27][28][29][30]. Interestingly, we found, by OCT measurement, that the anterior chamber angle was closed most often in the nasal quadrant, while, as a corollary, the temporal quadrant was the region least often affected (Table 4).…”

Value of optical coherence tomography for anterior segment surgery

“…However, many studies show that this localization can be difficult. 5,31,32 In a study by Sakata et al, 32 identification of the scleral spur was possible in 72% of cases. It was less detectable in patients with closed angles (assessed by gonioscopy) and in the superior and inferior quadrant.…”

Comparison of Scheimpflug imaging and spectral domain anterior segment optical coherence tomography for detection of narrow anterior chamber angles

“…The scleral spur was determined as the point at which there was a change in curvature of the inner surface of the angle wall. 22 Parameters measured were: (a) angle opening distance at 500 mm from the scleral spur (AOD500), defined by Pavlin et al 23 as the length of a line drawn from the anterior iris to the corneal endothelium perpendicular to a line drawn along the trabecular meshwork at a given distance from the scleral spur and (b) trabecular-iris space area at 500 mm from the scleral spur (TISA500), defined by Radhakrishnan et al 8,16 as a trapezoidal area with the following boundaries: anteriorly, AOD500; posteriorly, a line drawn from the scleral spur perpendicular to the plane of the inner scleral wall to the opposing iris; superiorly, the inner corneo-scleral wall; and inferiorly, the iris surface.…”