Indirect ophthalmoscopic stereo video system using three-dimensional LCD

Hyoun-Joong Kong; Jong Mo Seo; Jeong Min Hwang; Hee Chan Kim

doi:10.1117/12.810632

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18 February 2009 Indirect ophthalmoscopic stereo video system using three-dimensional LCD

Hyoun-Joong Kong, Jong Mo Seo, Jeong Min Hwang, Hee Chan Kim

Proceedings Volume 7237, Stereoscopic Displays and Applications XX; 72371L (2009) https://doi.org/10.1117/12.810632
Event: IS&T/SPIE Electronic Imaging, 2009, San Jose, California, United States

Abstract

Binocular indirect ophthalmoscope (BIO) provides a wider view of fundus with stereopsis contrary to the direct one. Proposed system is composed of portable BIO and 3D viewing unit. The illumination unit of BIO utilized high flux LED as a light source, LED condensing lens cap for beam focusing, color filters and small lithium ion battery. In optics unit of BIO, beam splitter was used to distribute an examinee's fundus image both to examiner's eye and to CMOS camera module attached to device. Captured retinal video stream data from stereo camera modules were sent to PC through USB 2.0 connectivity. For 3D viewing, two video streams having parallax between them were aligned vertically and horizontally and made into side-by-side video stream for cross-eyed stereoscopy. And the data were converted into autostereoscopic video stream using vertical interlacing for stereoscopic LCD which has glass 3D filter attached to the front side of it. Our newly devised system presented the real-time 3-D view of fundus to assistants with less dizziness than cross-eyed stereoscopy. And the BIO showed good performance compared to conventional portable BIO (Spectra Plus, Keeler Limited, Windsor, UK).

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Hyoun-Joong Kong, Jong Mo Seo, Jeong Min Hwang, and Hee Chan Kim "Indirect ophthalmoscopic stereo video system using three-dimensional LCD", Proc. SPIE 7237, Stereoscopic Displays and Applications XX, 72371L (18 February 2009); https://doi.org/10.1117/12.810632

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