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[OCT-goniometry before and after iridotomy in angle-closure glaucoma].
A Karandish1, C Wirbelauer, H Häberle
1Klinik für Augenheilkunde, Vivantes Klinikum Neukölln, Berlin.
Summary
Optical coherence tomography (OCT) effectively visualizes the anterior chamber angle in angle-closure glaucoma patients. Post-laser iridotomy, OCT confirmed significant widening of the angle, improving diagnosis and treatment evaluation.
Area of Science:
- Ophthalmology
- Medical Imaging
Background:
- Anterior chamber angle visualization is crucial for diagnosing angle-closure glaucoma.
- Optical coherence tomography (OCT) offers a noninvasive imaging method.
Purpose of the Study:
- To assess the utility of OCT in imaging anterior chamber angle width, iris configuration, and iris thickness in angle-closure glaucoma patients.
- To evaluate changes in these parameters after Nd:YAG laser iridotomy.
Main Methods:
- Slitlamp-adapted OCT was used to study 13 eyes of 11 angle-closure glaucoma patients.
- Measurements included angle width, angle opening distance (AOD), and iris thickness.
- Iris configuration was classified as steeply convex, convex, or flat.
Main Results:
- Preoperative mean angle width was 5.1 degrees, significantly increasing to 10.4 degrees post-iridotomy (p=0.007).
- Mean AOD increased from 71 microm to 143 microm post-iridotomy (p<0.001).
- Iris configuration predominantly shifted from convex to flat after treatment.
Conclusions:
- OCT enables noninvasive visualization and assessment of the anterior chamber angle in angle-closure glaucoma.
- OCT-based goniometry can enhance the evaluation of narrow or closed anterior chamber angles.