Optic disk size and optic disk-to-fovea distance in preterm and full-term infants

被引:68
作者
De Silva, Don Julian
Cocker, Ken D.
Lau, Gordon
Clay, Simon T.
Fielder, Alistair R.
Moseley, Merrick J.
机构
[1] Moorfields Eye Hosp, Dept Ophthalmol, London EC1V 2PD, England
[2] Western Eye Hosp, Dept Ophthalmol, London, England
[3] City Univ London, Dept Optometry & Visual Sci, London EC1V 0HB, England
[4] Univ London Imperial Coll Sci Technol & Med, Dept Phys, Photon Grp, London, England
[5] Univ London Imperial Coll Sci Technol & Med, Dept Visual Neurosci, London, England
关键词
D O I
10.1167/iovs.06-0152
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
PURPOSE. Few studies have assessed optic disk and retinal morphology in infants. Here the optic disk and optic disk-to-fovea distance were measured in preterm and full-term infants in vivo. METHODS. Optic disk (OD) dimensions and the center-to-center distance between the OD and the macula were measured using digital imaging in infants undergoing routine ophthalmic examinations. Postmenstrual age of the mother at the time of examination ranged from 32 to 50 weeks. From each image, the OD-to-fovea distance (ODF) and the OD height (ODH) and OD width (ODW) were measured. RESULTS. In 51 retinal images from 51 infants, mean +/- SD values obtained were 4.4 +/- 0.4 mm (ODF), 1.41 +/- 0.1 9 mm (ODH), and 1.05 +/- 0.13 mm (ODW). These dimensions did not change significantly over the age range studied. The mean value for the ratio between ODF and mean OD diameter (ODF/DD) was 3.76. CONCLUSIONS. Results of this in vivo study suggest that though the optic nerve head diameter increases by more than 50%, only limited growth occurs at the highly organized area of the posterior pole from birth to adulthood. This study discusses the finding of a large-angle kappa in infants and the use of a disk macula/disk diameter ratio in the diagnosis of optic nerve hypoplasia.
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页码:4683 / 4686
页数:4
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