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Article

A Study Validating the Estimation of Anterior Chamber Depth and Iridocorneal Angle with Portable and Non-Portable Slit-Lamp Microscopy

1
Department of Ophthalmology, Keio University School of Medicine, Tokyo 160-8582, Japan
2
OUI Inc., Tokyo 160-0022, Japan
3
Yokohama Keiai Eye Clinic, Kanagawa 240-0065, Japan
4
Department of Ophthalmology, Tsurumi University School of Dental Medicine, Kanagawa 230-8501, Japan
5
Department of Preventive Medicine and Public Health, School of Medicine, Keio University, Tokyo 160-8582, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: Zahid Yaqoob and Paola Saccomandi
Sensors 2021, 21(4), 1436; https://doi.org/10.3390/s21041436
Received: 20 January 2021 / Revised: 13 February 2021 / Accepted: 17 February 2021 / Published: 19 February 2021
(This article belongs to the Section Sensing and Imaging)
This study assessed the anterior chamber depth (ACD) and iridocorneal angle using a portable smart eye camera (SEC) compared to the conventional slit-lamp microscope and anterior-segment optical coherence tomography (AS-OCT). This retrospective case-control study included 170 eyes from 85 Japanese patients. The correlation between the ACD evaluations conducted with the SEC and conventional slit-lamp was high (r = 0.814). The correlation between the Van-Herick Plus grade obtained using two devices was also high (r = 0.919). A high kappa value was observed for the Van-Herick Plus grading (Kappa = 0.757). A moderate correlation was observed between the ACD measured using AS-OCT and the slit-lamp image acquired with the conventional slit-lamp microscope and SEC (r = 0.609 and 0.641). A strong correlation was observed between the trabecular-iris angle (TIA) measured using AS-OCT and Van-Herick Plus grade obtained with the conventional slit-lamp microscope and SEC (r = 0.702 and 0.764). Strong correlations of ACD evaluation and high kappa value of the Van-Herick Plus grading indicated the adequate subjective assessment function of the SEC. Moderate correlations between the ACD objective measurement and evaluation and strong correlation between the TIA and Van-Herick Plus grade suggested the good objective assessment function of the SEC. The SEC demonstrated adequate performance for ACD evaluation and angle estimation. View Full-Text
Keywords: smart eye camera; slit-lamp microscope; anterior chamber depth; trabecular-iris angle; anterior-segment optical coherence tomography smart eye camera; slit-lamp microscope; anterior chamber depth; trabecular-iris angle; anterior-segment optical coherence tomography
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MDPI and ACS Style

Shimizu, E.; Yazu, H.; Aketa, N.; Yokoiwa, R.; Sato, S.; Yajima, J.; Katayama, T.; Sato, R.; Tanji, M.; Sato, Y.; Ogawa, Y.; Tsubota, K. A Study Validating the Estimation of Anterior Chamber Depth and Iridocorneal Angle with Portable and Non-Portable Slit-Lamp Microscopy. Sensors 2021, 21, 1436. https://doi.org/10.3390/s21041436

AMA Style

Shimizu E, Yazu H, Aketa N, Yokoiwa R, Sato S, Yajima J, Katayama T, Sato R, Tanji M, Sato Y, Ogawa Y, Tsubota K. A Study Validating the Estimation of Anterior Chamber Depth and Iridocorneal Angle with Portable and Non-Portable Slit-Lamp Microscopy. Sensors. 2021; 21(4):1436. https://doi.org/10.3390/s21041436

Chicago/Turabian Style

Shimizu, Eisuke, Hiroyuki Yazu, Naohiko Aketa, Ryota Yokoiwa, Shinri Sato, Junichiro Yajima, Taiichiro Katayama, Rio Sato, Makoto Tanji, Yasunori Sato, Yoko Ogawa, and Kazuo Tsubota. 2021. "A Study Validating the Estimation of Anterior Chamber Depth and Iridocorneal Angle with Portable and Non-Portable Slit-Lamp Microscopy" Sensors 21, no. 4: 1436. https://doi.org/10.3390/s21041436

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