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Determining the size of retinal features in prematurely born children by fundus photography
Author(s) -
Knaapi Laura,
Lehtonen Tuomo,
Vesti Eija,
Lein Markku T.
Publication year - 2015
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/aos.12554
Subject(s) - fundus (uterus) , fundus photography , ophthalmology , optic disc , optometry , fundus camera , medicine , retinal , retina , retinopathy of prematurity , ophthalmoscopy , optics , gestational age , physics , fluorescein angiography , biology , pregnancy , genetics
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.