{Reference Type}: Journal Article
{Title}: Determining the size of retinal features in prematurely born children by fundus photography.
{Author}: Knaapi L;Lehtonen T;Vesti E;Leinonen MT;
{Journal}: Acta Ophthalmol
{Volume}: 93
{Issue}: 4
{Year}: Jun 2015
{Factor}: 3.988
{DOI}: 10.1111/aos.12554
{Abstract}: <B>OBJECTIVE: </B>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.<BR><B>METHODS: </B>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.<BR><B>RESULTS: </B>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).<BR><B>CONCLUSIONS: </B>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.