August 2019
Volume 60, Issue 11
Open Access
ARVO Imaging in the Eye Conference Abstract  |   August 2019
Fundus imaging through lenticular media opacities using broad line fundus imaging
Author Affiliations & Notes
  • Angelina Covita
    Carl Zeiss Meditec, Inc, California, United States
  • Michael Chen
    Carl Zeiss Meditec, Inc, California, United States
  • Conor Leahy
    Carl Zeiss Meditec, Inc, California, United States
  • Jesse J. Jung
    Carl Zeiss Meditec, Inc, California, United States
  • Scott Lee
    Carl Zeiss Meditec, Inc, California, United States
  • Footnotes
    Commercial Relationships   Angelina Covita, Carl Zeiss Meditec, Inc (E); Michael Chen, Carl Zeiss Meditec, Inc (E); Conor Leahy, Carl Zeiss Meditec, Inc (E); Jesse J. Jung, Carl Zeiss Meditec, Inc (C); Scott Lee, Carl Zeiss Meditec, Inc (C)
  • Footnotes
    Support  none
Investigative Ophthalmology & Visual Science August 2019, Vol.60, PB042. doi:
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    • Get Citation

      Angelina Covita, Michael Chen, Conor Leahy, Jesse J. Jung, Scott Lee; Fundus imaging through lenticular media opacities using broad line fundus imaging. Invest. Ophthalmol. Vis. Sci. 2019;60(11):PB042.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : Broad line fundus imaging (BLFI) is a technique that aims to reduce artifacts in wide field fundus images. The illumination and imaging paths are separated in the patient pupil. By illuminating only a narrow strip of the retina at any instant, the illumination is separated from the imaging path, removing haze and fluorescence from the anterior segment out of the retinal image (refer to Figure 1). The purpose of this study is to characterize the performance of a commercially available BLFI system for imaging through varying levels of media opacity.

Methods : Eyes with varying types and severities of cataracts were recruited for this study. The pupils were pharmacologically dilated, and the cataracts were graded at the slit lamp by a licensed eye care provider. Each subject was then imaged on a CLARUS™ 500 (ZEISS, Dublin, CA). A wide field color image with central fixation was obtained for each eye. Images were exported and graded by an ophthalmic technician. Each image was graded on a 1-5 scale, where 5 exhibit an image that a clinician can assess and diagnose with complete confidence. These images present exceptional sharpness and contrast (Figure 2). 1 represents zero visibility and a non-diagnostic image. A passing image is graded 3 or above.

Results : 61 eyes of 32 subjects with an age range of 55-95, (mean 68, SD=19), were imaged as part of this study. 61 images were acquired and graded. Types of cataract included cortical sclerotic (CS), nuclear sclerotic (NS) and posterior subcapsular cataract is (PSC). Figure 3 displays the number of passing images out of the total image count of each cataract type and grade. The percentage indicates the passing grade (>Grade 3). The majority of images had a passing grade or better.

Conclusions : In this group of subjects, BLFI produced clinically usable images in the presence of a variety of media opacities. Further studies would be useful to compare the performance of BLFI vs traditional fundus cameras or scanning LASER ophthalmoscopes.

This abstract was presented at the 2019 ARVO Imaging in the Eye Conference, held in Vancouver, Canada, April 26-27, 2019.

 

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