Determining the size of retinal features in prematurely born children by fundus photography.

Abstract

PURPOSE:

The purpose was to study the effect of prematurity on the macula-disc centre distance and whether it could be used as a reference tool for determining the size of retinal features in prematurely born children by fundus photography.

METHODS:

The macula-disc centre distance of the left eye was measured in pixels from digital fundus photographs taken from 27 prematurely born children aged 10-11 years with Topcon fundus camera. A conversion factor for Topcon fundus camera (194.98 pixel/mm for a 50° lens) was used to convert the results in pixels into metric units.

RESULTS:

The macula-disc centre distance was 4.74 mm, SD 0.29. No correlation between ametropia and the macula-disc centre distance was found (r = -0.07, p > 0.05). One child (subject 20) had high myopia and retinopathy of prematurity (ROP), and the macula-disc centre distance was longer than average (6.35 mm).

DISCUSSION:

The macula-disc centre distance in prematurely born children at the age of 10-11 years provides an easy-to-use reference tool for evaluating the size of retinal features on fundus photographs. However, if complications of ROP, for example temporal macular dragging or high ametropia, are present, the macula-disc centre distance is potentially altered and a personal macula-disc centre distance should be determined and used as a refined reference tool.

• Authors: Laura Knaapi, Tuomo Lehtonen, Eija Vesti, Markku T Leinonen
• Journal: Acta ophthalmologica (Acta Ophthalmol) Vol. 93 Issue 4 Pg. 339-41 (Jun 2015) ISSN: 1755-3768 [Electronic] England
• PMID: 25270671 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2014 Acta Ophthalmologica Scandinavica Foundation. Published by John Wiley & Sons Ltd.

Topics

• Axial Length, Eye
• Birth Weight
• Child
• Diagnostic Techniques, Ophthalmological
• Gestational Age
• Humans
• Infant, Premature
• Macula Lutea (anatomy & histology, pathology)
• Optic Disk (anatomy & histology, pathology)
• Photography (methods)
• Reference Values
• Retinopathy of Prematurity (diagnosis)