Comparative characteristics of gonioscopy and anterior segment optical coherence tomography in visualizing the iridotrabecular contact
https://doi.org/10.21516/2072-0076-2026-19-1-79-84
Abstract
Purpose: to compare iridotrabecular contact (ITC) imaging findings of gonioscopy and anterior segment optical coherence tomography (AS-OCT) in patients with primary angle closure disease (PACD).
Material and methods. Retrospective analysis of the data from 20 patients with primary angle closure and 23 with early stage primary angle-closure glaucoma aged 49 to 82 years was performed. All participants along with gonioscopy underwent AS-OCT on CASIA2 (Tomey Corporation, Nayoga, Japan) including assessment of the ITC Index and ITC Area.
Results. According to gonioscopy, the average value of the number of sectors of the anterior chamber angle (ACA) of a closed and narrow profile (with a degree of opening from 0 to 2 according to Schaffer) was significantly higher than according to AS-OCT data (3.56 ± 0.65 and 2.04 ± 0.81 respectively, p = 0.02). The degree of opening of the ACA according to Shaffer differed significantly between the superior and inferior (0.06 ± 0.25 and 1.30 ± 1.22, respectively, p = 0.00), superior and nasal (0.06 ± 0.25 and 0.72 ± 1.00, respectively, p = 0.01), temporal and inferior (0.20 ± 0.51 and 1.30 ± 1.22, respectively, p = 0.04) sectors. No significant differences were found between the superior and temporal, nasal and inferior, as well as temporal and nasal sectors (all p > 0.05). According to AS-OCT data, the ITC parameters were: ITC Index = 45.4 ± 21.8% and ITC Area = 5.81 ± 3.90 mm2. Conclusion. In PACD, gonioscopic closure of the ACA (absence of visualization of the trabecular meshwork at least 180°) does not mean the presence of an ITC, as detected by AS-OCT. The superior sector of the ACA is the most vulnerable to angle closure in patients with this pathology.
About the Authors
N. I. Kurysheva
Medical Biological University of Innovations and Continuing Education of the A.I. Burnazyan Federal Biophysical Center;
Ophthalmological Center of A.I. Burnazyan Federal Medical-Biological Agency, Federal Biophysical Center
Russian Federation
Russian Federation
Natalia I. Kurysheva — Dr. of Med. Sci., professor, head of the ophthalmology department, Medical Biological University of Innovations and Continuing Education of the A.I. Burnazyan Federal Biophysical Center; head of the consultative and diagnostic department, Ophthalmological Center of A.I. Burnazyan Federal Medical-Biological Agency, Federal Biophysical Center
8, Zhivopisnaya St., Moscow, 123098,
15, Gamalei St., Moscow, 123098
G. A. Sharova
Medical Biological University of Innovations and Continuing Education of the A.I. Burnazyan Federal Biophysical Center;
Ophthalmology Clinic of Dr. Belikova
Russian Federation
Russian Federation
Galina A. Sharova — Cand. of Med. Sci., assistant professor at the ophthalmology department, Medical Biological University of Innovations and Continuing Education of the A.I. Burnazyan Federal Biophysical Center; head of the diagnostic ophthalmology department, Ophthalmology Clinic of Dr. Belikova
8, Zhivopisnaya St., Moscow, 123098,
26/2, Budenny Ave, Moscow, 105118
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For citations:
Kurysheva N.I., Sharova G.A. Comparative characteristics of gonioscopy and anterior segment optical coherence tomography in visualizing the iridotrabecular contact. Russian Ophthalmological Journal. 2026;19(1):79-84. (In Russ.) https://doi.org/10.21516/2072-0076-2026-19-1-79-84
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