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

Stephen James Talks, Vina Manjunath, David H W Steel, Tunde Peto, Roy Taylor

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)
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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 naïve 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 naïve 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.

Original languageEnglish
Pages (from-to)1606-9
Number of pages4
JournalBritish Journal of Ophthalmology
Volume99
Issue number12
Early online date20 Nov 2015
DOIs
Publication statusPublished - 01 Dec 2015
Externally publishedYes

Keywords

  • Diabetic Retinopathy
  • Diagnostic Techniques, Ophthalmological
  • Fluorescein Angiography
  • Humans
  • Photography
  • Retinal Neovascularization
  • Retinal Vessels
  • Visual Fields
  • Journal Article
  • Research Support, Non-U.S. Gov't

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