Abstract
PurposeTo investigate retinal vessel shift (RVS) and its association with axial length (AL) elongation in junior high school students.MethodsTotal 161 eyes of 161 healthy junior high school students were prospectively studied. Optical AL and anterior chamber depth (ACD) measurements, and fundus photography were performed in the first and third grades. Eyes of subjects in the first and third grade that had perfect matching among all the retinal vessels were allocated to the RVS(−) group, otherwise allocated to the RVS(+) group. In the RVS(+) group, the peripapillary retinal arteries angle (PRAA) was measured for quantitative analysis of RVS; the angle between the major retinal arteries. The variables related to PRAA were identified using model selection with the corrected Akaike information criterion.ResultsForty-two eyes (26.1%) were allocated to the RVS(+) group. There were seven patterns in the RVS of those in the RVS(+) group, including clockwise shift in the supra temporal area (5 eyes), infra temporal area (7 eyes), and nasal area (9 eyes); anticlockwise shift in the supra temporal area (7 eyes), infra temporal area (5 eyes), and nasal area (2 eyes); and distal shift in the temporal area (7 eyes). The optimal model for the PRAA narrowing included larger AL and body weight in the first grade, and greater AL elongation.ConclusionVarious (seven) RVS patterns were observed in about 25% of the junior high school students within two years. RVS was associated with AL elongation, and useful to reveal the mechanism of myopic retinal stretch.
Highlights
Myopia is one of the most prevalent ocular disorders, and high myopia is a common cause of blindness [1]
The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript
Various retinal vessel shift (RVS) patterns were observed in about 25% of the junior high school students within two years
Summary
Myopia is one of the most prevalent ocular disorders, and high myopia is a common cause of blindness [1]. The global prevalence of myopia has increased rapidly during the previous 50 years and poses a considerable socio-economic burden on individuals and the society [2,3]. It is becoming a more serious problem in Asian countries [4,5,6] because the incidence is increasing and the age of the onset is lowering [2,3]. One of the characteristic findings in such eyes is that the supra and infra thick retinal nerve fiber (RNF) bundles shift toward the fovea as axial elongation [7,10,11]. It is useful to analyze the retinal vessel trajectory to understand the retinal structural change associated with the development of myopia
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