Department of Biomedical Engineering, University of Illinois at Chicago, Chicago, IL 60607, USA.
Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA.
Exp Biol Med (Maywood). 2022 Feb;247(4):289-299. doi: 10.1177/15353702211063477. Epub 2021 Dec 8.
A portable, low cost, widefield fundus camera is essential for developing affordable teleophthalmology. However, conventional trans-pupillary illumination used in traditional fundus cameras limits the field of view (FOV) in a snapshot image, and frequently requires pharmacologically pupillary dilation for reliable examination of eye conditions. This minireview summarizes recent developments in alternative illumination approaches for widefield fundus photography. Miniaturized indirect illumination has been used to enable compact design for developing low cost, portable, widefield fundus camera. Contact mode trans-pars-planar illumination has been validated for ultra-widefield fundus imaging of infant eyes. Contact-free trans-pars-planar illumination has been explored for widefield imaging of adult eyes. Trans-palpebral illumination has been also demonstrated in a smartphone-based widefield fundus imager to foster affordable teleophthalmology.
对于发展经济实惠的远程眼科医疗，便携式、低成本、超广角眼底相机至关重要。然而，传统眼底相机中使用的传统瞳孔间光照明限制了快照图像的视场 (FOV)，并且通常需要药理学瞳孔扩张才能可靠地检查眼部状况。本综述总结了超广角眼底摄影中替代照明方法的最新进展。小型化间接照明已被用于为开发低成本、便携式、超广角眼底相机提供紧凑的设计。接触式经瞳孔平面照明已被验证可用于婴儿眼睛的超广角眼底成像。接触式经瞳孔平面照明已被探索用于成人眼睛的超广角成像。经眼睑照明也已在基于智能手机的超广角眼底成像仪中得到证明，以促进经济实惠的远程眼科医疗。
