Dutt Sreetama, Vadivel Siva S, Nagarajan Shanmuganathan, Galagali Amrutha, Christy Josephine S, Sivaraman Anand, Rao Divya Parthasarathy
Research & Development, Remidio Innovative Solutions Pvt. Ltd., Bengaluru, Karnataka, India.
Cornea & Refractive Services, Aravind Eye Hospital, Pondicherry, India.
Indian J Ophthalmol. 2021 May;69(5):1257-1262. doi: 10.4103/ijo.IJO_3707_20.
To report a novel, telemedicine-friendly, smartphone-based, wireless anterior segment device with instant photo-documentation ability in the COVID-19 era.
Anterior Imaging Module (AIM) was constructed based on a 50/50 beam splitter design, to match the magnification drum optics of slit-lamps with a three-step or higher level of magnification. The design fills the smartphone sensor fully at the lowest magnification and matches the fixed focus of the slit-lamp. It comes with a smartphone for instant photo-documentation, an in-built software application for data-management and secure HIPAA compliant cloud storage, and a Bluetooth trigger for a one-tap image capture. The construction of the device is explained, and the optical resolution measured using U.S. air-force resolution test. AIM's performance was characterized with traceability to internationally relevant performance standards for digital slit-lamps after image quality assessment through a pilot study.
Clinically useful anterior segment images were obtained with both diffuse and slit illumination at different magnification settings with the highest magnification (40X) resolution of 359 lines per cm and the lowest magnification (16X) resolution of 113 lines per cm.
AIM is a novel, wireless, telemedicine-enabled design that digitizes existing, analog slit lamps with at least three-step magnification. The settings ensure the focus is determined purely by the position of the slit-lamp. Hence, the image viewed and captured on the smartphone is exactly what the clinician sees through the eyepiece. This helps in maintaining distance from the patient in the ongoing COVID-19 pandemic, as well.
报告一种新型的、适合远程医疗的、基于智能手机的无线眼前节设备，在新冠疫情时代具备即时照片记录功能。
前节成像模块（AIM）基于50/50分光镜设计构建，以匹配裂隙灯的放大鼓光学系统，具有三步或更高倍数的放大功能。该设计在最低放大倍数时能完全填满智能手机传感器，并与裂隙灯的固定焦距相匹配。它配备一部用于即时照片记录的智能手机、一个用于数据管理和符合HIPAA安全标准的云存储的内置软件应用程序，以及一个用于一键图像捕捉的蓝牙触发器。阐述了该设备的构造，并使用美国空军分辨率测试来测量光学分辨率。通过一项初步研究对图像质量进行评估后，根据国际相关数字裂隙灯性能标准对AIM的性能进行了表征。
在不同放大倍数设置下，使用漫射光和裂隙光照明均获得了临床上有用的眼前节图像，最高放大倍数（40倍）时分辨率为每厘米359线，最低放大倍数（16倍）时分辨率为每厘米113线。
AIM是一种新型的、无线的、支持远程医疗的设计，可将现有的模拟裂隙灯数字化，具有至少三步放大功能。这些设置确保焦点完全由裂隙灯的位置决定。因此，在智能手机上查看和拍摄的图像与临床医生通过目镜看到的完全一致。这也有助于在当前的新冠疫情中与患者保持距离。
