Near-infrared light-guided miniaturized indirect ophthalmoscopy for nonmydriatic wide-field fundus photography

A portable fundus imager is essential for emerging telemedicine screening and point-of-care examination of eye diseases. However, existing portable fundus cameras have limited field of view (FOV) and frequently require pupillary dilation. We report here a miniaturized indirect ophthalmoscopy-based n...

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Bibliographic Details
Published inOptics letters Vol. 43; no. 11; p. 2551
Main Authors Toslak, Devrim, Liu, Changgeng, Alam, Minhaj Nur, Yao, Xincheng
Format Journal Article
LanguageEnglish
Published United States 01.06.2018
Subjects
Diagnostic Techniques, Ophthalmological
Eye Diseases - diagnosis
Fundus Oculi
Humans
Infrared Rays
Miniaturization
Mydriatics - administration & dosage
Ophthalmoscopes
Ophthalmoscopy - methods
Photography - methods
Telemedicine
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Summary:A portable fundus imager is essential for emerging telemedicine screening and point-of-care examination of eye diseases. However, existing portable fundus cameras have limited field of view (FOV) and frequently require pupillary dilation. We report here a miniaturized indirect ophthalmoscopy-based nonmydriatic fundus camera with a snapshot FOV up to 67° external angle, which corresponds to a 101° eye angle. The wide-field fundus camera consists of a near-infrared light source (LS) for retinal guidance and a white LS for color retinal imaging. By incorporating digital image registration and glare elimination methods, a dual-image acquisition approach was used to achieve reflection artifact-free fundus photography.
ISSN:1539-4794
DOI:10.1364/OL.43.002551