Assessment of the changes in anterior segment parameters by ultrasound biomicroscopy after laser peripheral iridotomy

2019 ◽  
Vol 20 (1) ◽  
pp. 32
Author(s):  
Hisham Saad ◽  
Jihan Helal ◽  
Moataz Sabry ◽  
Alaa Eldorghamy
Keyword(s):  
Anterior Segment ◽  
Ultrasound Biomicroscopy ◽  
Laser Peripheral Iridotomy ◽  
Anterior Segment Parameters ◽  
Peripheral Iridotomy

scholarly journals Recurrent Uveal Effusion after Laser Iridotomy

2017 ◽  
Vol 8 (1) ◽  
pp. 26-30 ◽  
Author(s):  
Hiroshi Sakai ◽  
Michiko Yonahara ◽  
Miyako Sakai
Keyword(s):  
Anterior Segment ◽  
Ultrasound Biomicroscopy ◽  
Angle Closure ◽  
Ocular Pain ◽  
Laser Peripheral Iridotomy ◽  
Blurred Vision ◽  
Laser Iridotomy ◽  
Primary Angle Closure ◽  
Peripheral Iridotomy ◽  
Uveal Effusion

A 59-year-old woman was seen by an ophthalmologist for blurred vision, ocular pain, headache, and nausea. She was diagnosed with acute primary angle closure (APAC) and successfully treated with medications. Using ultrasound biomicroscopy (UBM), engorged episcleral vein was observed and small uveal effusion was diagnosed after laser peripheral iridotomy (LPI). The uveal effusion disappeared and was again diagnosed by UBM together with anterior segment inflammation with ocular pain. Iritis caused by LPI after APAC might be a cause of uveal effusion in this specific case.

scholarly journals Biometric Indicators of Anterior Segment Parameters Before and After Laser Peripheral Iridotomy by Swept-Source Optical Coherent Tomography

2021 ◽  
Author(s):  
Bo Yu ◽  
Kang Wang ◽  
Xiaoli Xing
Keyword(s):  
Anterior Chamber ◽  
Anterior Segment ◽  
Angle Closure ◽  
Laser Peripheral Iridotomy ◽  
Swept Source ◽  
Optical Coherent Tomography ◽  
Primary Angle Closure ◽  
Before And After ◽  
Anterior Segment Parameters ◽  
Peripheral Iridotomy

Abstract Background Primary angle closure glaucoma (PACG) is the most common type of glaucoma in China. Laser peripheral iridotomy (LPI) is the primary choice to treat PAC. We aim to evaluate the changes and to find the biometric indicators of anterior segment parameters before and after laser peripheral iridotomy (LPI) in primary angle closure (PAC) eyes using swept-source optical coherent tomography (OCT). Methods LPI was performed in 52 PAC eyes of 28 participants. The change of intraocular pressure and anterior segment parameters, including angle opening distance (AOD500), AOD500 area, trabecular iris space area (TISA500), TISA500 volume, trabecular iris angle (TIA500), iridotrabecular contact (ITC) index, ITC area, anterior chamber volume (ACV), anterior chamber depth (ACD), lens vault (LV) and lens thickness (LT) before and 1 week after LPI were measured by Tomey CASIA2 anterior segment OCT. We also estimate and analyze potential contributing factors possibly affecting the change of anterior chamber angle parameters. Results No post-laser complications were found. The LV and LT did not change significantly 1 week after LPI. AOD500, AOD500 area, TISA500, TISA500 volume, TIA500, ACV and ACD increased significantly after LPI. There was significant decrease in ITC index and ITC area. LT was positively correlated to the change of ITC index (r=0.411, p=0.002) and ITC area (r=0.384, p=0.005). ACD was negatively correlated to the change of ITC index (r=0.292, p=0.036). Conclusions The anterior segment architecture significantly changed after LPI in PAC spectrum eyes. Crystalline lens measurements remained unchanged before and after LPI. AS-OCT can be used to follow anterior chamber parameter changes in PAC spectrum eyes. Pre-treatment LT and ACD affect the therapeutic effect of LPI.

Changes in Anterior Segment Morphology After Laser Peripheral Iridotomy in Acute Primary Angle Closure

2016 ◽  
Vol 166 ◽  
pp. 133-140 ◽  
Author(s):  
Sasan Moghimi ◽  
Rebecca Chen ◽  
Mohammadkarim Johari ◽  
Faezeh Bijani ◽  
Massood Mohammadi ◽  
...  
Keyword(s):  
Anterior Segment ◽  
Angle Closure ◽  
Laser Peripheral Iridotomy ◽  
Acute Primary Angle Closure ◽  
Primary Angle Closure ◽  
Peripheral Iridotomy

scholarly journals Effects of Laser Peripheral Iridotomy in Subgroups of Primary Angle Closure Based on Iris Insertion

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Sung-Cheol Yun ◽  
Ji Wook Hong ◽  
Kyung Rim Sung ◽  
Jin Young Lee
Keyword(s):  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Multivariate Regression Analysis ◽  
Angle Closure ◽  
Laser Peripheral Iridotomy ◽  
Factors Affecting ◽  
Primary Angle Closure ◽  
Before And After ◽  
Qualitative Classification ◽  
Peripheral Iridotomy

Purpose. To investigate the effect of laser peripheral iridotomy (LPI) in subgroups of primary angle closure based on iris insertion configuration.Methods. Anterior segment optical coherence tomography (AS-OCT) images were obtained before and two weeks after LPI. Qualitative classification of angle closure eyes according to iris insertion (basal insertion group (BG) and nonbasal insertion group (NBG)) was performed. Anterior chamber depth (ACD), lens vault (LV), iris curvature, iris area, iris thickness (IT750), and angle opening distance (AOD750) 750 microns from scleral spur were calculated. Uni- and multivariate regression analysis was carried out to evaluate factors associated with AOD750before and after LPI.Results. Ninety-two eyes of 92 subjects were categorized as NBG (39 eyes) or BG (53 eyes). The mean change after LPI was not significantly different between two groups in all parameters. In both groups, AOD750was affected by ACD (p<0.001,p=0.044) before LPI. AOD750was affected by LV (p=0.012) in NBG, but by ACD (p<0.001) and IT750(p=0.039) in BG after LPI.Conclusions. The outcomes of LPI are not significantly different between angle closure subgroups with different iris insertions. However, factors affecting AOD750show differences between two subgroups after LPI.

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