Department of Vitreo-Retina, Giridhar Eye Institute, Cochin, Kerala, India.
Department of Retina, Lotus Eye Hospital and Institute, Coimbatore, Tamil Nadu, India.
Indian J Ophthalmol. 2019 Jun;67(6):840-845. doi: 10.4103/ijo.IJO_1177_18.
To suggest a low cost, non-contact smartphone-based screening system in retinopathy of prematurity (ROP), and to illustrate its potential clinical application as a potential future tool for teleophthalmology.
Neonatal intensive care unit (NICU)-based bedside ROP screening done between January 2018 and May 2018. Documentation of ROP was done by using a smartphone and +40D, +28D, or +20D indirect non-contact condensing lenses. By using the coaxial light source of the phone, this system works as an indirect ophthalmoscope that creates a digital image of the fundus. With smartphone-based camera we extracted high-quality still images extracted from the video clip.
Total of 228 eyes of 114 infants screened for ROP between January 2018 and May 2018. Incidence of total ROP was 23.68%, out of which incidence of type 1 ROP was 8.77%. After initial screening with indirect ophthalmoscope, we uesd smartphone imaging to document ROP in 28 eyes out of 55 eyes having ROP. Image quality was good in 89.28% eyes. Field of view vary from 46°, 53°, and 90° with +20D, +28D, and +40D indirect condensing lenses, respectively, which gives excellent images for bedside ROP documentation.
The described technique of smartphone fundus photography is a light weight, cost-effective, user friendly, high-quality wide-field fundus photographs for bedside documentation of ROP in NICUs using readily available instruments that are handy and portable with simple power sources. Smartphones has the potential to be operated with only one hand. It can also be used as a future telescreening device.
提出一种低成本、非接触式的基于智能手机的早产儿视网膜病变（ROP）筛查系统，并说明其作为远程眼科潜在未来工具的潜在临床应用。
2018 年 1 月至 5 月在新生儿重症监护病房（NICU）进行床边 ROP 筛查。使用智能手机和+40D、+28D 或+20D 间接接触式聚光透镜记录 ROP。该系统利用手机的同轴光源，作为间接检眼镜，可对眼底创建数字图像。通过基于智能手机的摄像头，我们从视频剪辑中提取高质量的静态图像。
2018 年 1 月至 5 月期间，共有 114 例婴儿的 228 只眼筛查 ROP。ROP 的总发生率为 23.68%，其中 1 型 ROP 的发生率为 8.77%。在使用间接检眼镜进行初步筛查后，我们在 55 只患有 ROP 的眼中，使用智能手机成像记录了 28 只眼中的 ROP。89.28%的眼睛图像质量良好。使用+20D、+28D 和+40D 间接聚光透镜，视场分别为 46°、53°和 90°，可提供出色的床边 ROP 记录图像。
描述的智能手机眼底摄影技术是一种轻便、经济高效、用户友好、高质量的广角眼底照片，可用于 NICU 床边记录 ROP，使用的仪器都是现成的、轻便便携的，且操作简单、易于携带。智能手机只需单手即可操作。它也有可能成为未来的远程筛查设备。
