TY - JOUR
T1 - Position of central vascular trunk and shape of optic nerve head in Newborns
AU - Kim, Martha
AU - Kim, So Young
AU - Lee, Kyoung Min
AU - Oh, Sohee
AU - Kim, Seok Hwan
N1 - Publisher Copyright:
Copyright 2019 The Authors
PY - 2019/8
Y1 - 2019/8
N2 - PURPOSE. To investigate the baseline position of the central vascular trunk (CVT) and the characteristics of the optic nerve head (ONH) in newborns. METHODS. CVT position was evaluated based on fundus images obtained from newborns who had undergone eye-screening examinations. It was then graded according to the optic disc area as follows: grade 1, within central 4%; grade 2, within central 9%; grade 3, within central 16%; grade 4, within central 25%; grade 5, outside central 25% of optic disc area. The direction of the CVT position was determined in cases of grade 2 or more as superior, inferior, nasal, and temporal, relative to the optic disc center. The ovality index and the vertical cup-to-disc ratio were determined as well. RESULTS. In 1000 fundus images from 1000 newborns, 87.1% showed grade 1 (95% confidence interval 84.7–88.8), and 10.7% showed grade 2. The most common CVT direction was central (87.1%, grade 1), followed by nasal (11.0%) and inferior (1.2%). The ovality index was 1.28 6 0.09 (range, 1.01–1.61). The ONH shape was vertically oval and highly uniform. The average vertical cup-to-disc ratio was 0.29 6 0.13 (range, 0.00–0.67). CONCLUSIONS. The CVT of newborns was located in the central area of the ONH in most cases. The shape of the optic disc was vertically oval, and very similar among the newborns. Considering the high variability of ONH morphology and the diverse location of the CVT in adults, our result suggests that the shape of the ONH and the CVT position might change during eyeball growth.
AB - PURPOSE. To investigate the baseline position of the central vascular trunk (CVT) and the characteristics of the optic nerve head (ONH) in newborns. METHODS. CVT position was evaluated based on fundus images obtained from newborns who had undergone eye-screening examinations. It was then graded according to the optic disc area as follows: grade 1, within central 4%; grade 2, within central 9%; grade 3, within central 16%; grade 4, within central 25%; grade 5, outside central 25% of optic disc area. The direction of the CVT position was determined in cases of grade 2 or more as superior, inferior, nasal, and temporal, relative to the optic disc center. The ovality index and the vertical cup-to-disc ratio were determined as well. RESULTS. In 1000 fundus images from 1000 newborns, 87.1% showed grade 1 (95% confidence interval 84.7–88.8), and 10.7% showed grade 2. The most common CVT direction was central (87.1%, grade 1), followed by nasal (11.0%) and inferior (1.2%). The ovality index was 1.28 6 0.09 (range, 1.01–1.61). The ONH shape was vertically oval and highly uniform. The average vertical cup-to-disc ratio was 0.29 6 0.13 (range, 0.00–0.67). CONCLUSIONS. The CVT of newborns was located in the central area of the ONH in most cases. The shape of the optic disc was vertically oval, and very similar among the newborns. Considering the high variability of ONH morphology and the diverse location of the CVT in adults, our result suggests that the shape of the ONH and the CVT position might change during eyeball growth.
KW - Central vascular trunk position
KW - Fundus photography
KW - Newborn
KW - Optic nerve head shape
UR - http://www.scopus.com/inward/record.url?scp=85071155407&partnerID=8YFLogxK
U2 - 10.1167/IOVS.19-27363
DO - 10.1167/IOVS.19-27363
M3 - Article
C2 - 31387114
AN - SCOPUS:85071155407
SN - 0146-0404
VL - 60
SP - 3381
EP - 3387
JO - Investigative Ophthalmology and Visual Science
JF - Investigative Ophthalmology and Visual Science
IS - 10
ER -