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New vessels detected on wide-field imaging compared to two-field and seven-field imaging: implications for diabetic retinopathy screening image analysis

Lookup NU author(s): James Talks, Vina Manjunath Manjunath, David Steel, Professor Roy Taylor

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

Introduction Wide-field retinal imaging (Optomap), used for detecting diabetic retinopathy (DR), has been shown to compare well with seven-field early treatment diabetic retinopathy study (ETDRS) photographs. An Optomap 200 image covers 80% of the retinal surface, compared with the standard seven-field, 30 images, covering 30% of the retinal surface. In England, DR screening is performed by grading two, 45 images per eye, by the DR screening service (DRSS).Purpose To assess how often retinal new vessels (NVs) are observed on Optomap imaging, outside the DRSS two fields and standard seven-field photography, in a cohort of patients referred by the DRSS.Method A consecutive series of treatment naive patients with DR, referred from DRSS with pre-proliferative or proliferative DR or diabetic maculopathy, were imaged with Optomap colour images, within 3 months of DRSS referral. The incidence and distribution of NVs were recorded in relation to two-field and seven-field areas.Results NVs were found in 102 of 1562 treatment naive eyes (6.5%) of 781 patients. Of these, 72 were referred from DRSS as having NVs, but an additional 30 eyes (29% of NVs detected) from 25 patients were referred with a lesser degree of DR. In 25 of the 30 eyes without NVs reported on referral, NVs were located outside the standard two fields taken at DRSS, and in 12, NVs were outside the area covered on seven-field imaging (11.7% of eyes with NVs).Conclusions Wide-field imaging with Optomap detected approximately 30% more NVs than standard two-field imaging in patients referred from a UK DRSS.


Publication metadata

Author(s): Talks SJ, Manjunath V, Steel DHW, Peto T, Taylor R

Publication type: Article

Publication status: Published

Journal: British Journal of Ophthalmology

Year: 2015

Volume: 99

Issue: 12

Pages: 1606-1609

Print publication date: 01/12/2015

Online publication date: 13/08/2015

Acceptance date: 21/05/2015

Date deposited: 05/04/2016

ISSN (print): 0007-1161

ISSN (electronic): 1468-2079

Publisher: BMJ Publishing Group

URL: http://dx.doi.org/10.1136/bjophthalmol-2015-306719

DOI: 10.1136/bjophthalmol-2015-306719


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