ORCID Profile
0000-0003-3436-2010
Current Organisations
Universidade do Minho
,
University of California, San Diego
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: Elsevier BV
Date: 2023
DOI: 10.1016/J.OPTOM.2021.12.002
Abstract: The aim of this study was to compare central and peripheral refraction using an open view Shin-Nippon NVision-K 5001 autorefractor and an open view COAS-HD VR aberrometer in young children. Cycloplegic central and peripheral autorefraction was measured in the right eye of 123 children aged 8 to 16 years. Three measurements each were obtained with both Shin-Nippon NVision-K 5001 autorefractor and COAS-HD VR aberrometer along the horizontal visual field up to 30° (nasal and temporal) in 10° steps. The refraction from the autorefractor was compared with aberrometer refraction for pupil analysis diameters of 2.5-mm and 5.0-mm. The Shin-Nippon was 0.30 D more hyperopic than COAS-HD VR at 2.5-mm pupil and 0.50 D more hyperopic than COAS-HD VR at 5-mm pupil for central refraction. For both pupil sizes, the 95% limits of agreement were approximately 0.50 D for central refraction, and limits were wider in the nasal visual field compared to the temporal visual field. The mean difference for both J Defocus components were similar between the Shin-Nippon autorefractor and the COAS-HD VR aberrometer with a 2.5-mm pupil for most visual field angles. However, there was a significant difference in defocus component between the Shin-Nippon autorefractor and the COAS-HD VR aberrometer with a 5.0-mm pupil, wherein the autorefractor measured more hyperopia. The astigmatic components J
Publisher: Cold Spring Harbor Laboratory
Date: 02-09-2022
DOI: 10.1101/2022.08.31.22279457
Abstract: The prevalence of myopia in Scandinavia seems to differ from other parts of the world and the reasons remain poorly investigated. The current study investigated the incidence of myopia, myopic shift, and associated risk factors in Swedish schoolchildren. This study also investigated the development of refractive error under the effect of COVID-19 restrictions. This longitudinal study was conducted between Jan-2019 and June-2021 in which a cohort of Swedish schoolchildren aged 8-16 years were recruited. Myopia was defined as spherical equivalent refraction (SER) -0.50D. Myopic shift was defined as a minimum change in SER of -0.50D between each visit. Cumulative incidence (CIN) and incidence rate (IRA) were computed. Cox-regression and linear mixed models were used to modulate myopic shift and changes in SER. The study enrolled 128 participants, 86% Caucasian, 70 females, mean age 12.0 years (SD=2.4). The CIN of myopia during the two-years follow-up was 5.5%, IRA of myopia was 3.2 cases per 100 person-years. The CIN of myopic shift during the two-years was 21.0%, IRA of myopic shift was 12.4 cases per 100 person-years. Cox regression revealed that the probability of myopic shift reduced with age and increased with axial length/corneal-curvature ratio . Myopic children at the baseline and children with two myopic parents showed a significant faster-paced negative SER change over time. Changes in SER during the first year of the study were more marked than changes during the second year that coincided with the Covid pandemic. In the current study the incidence of myopia and myopic shift was low when compared with countries in East Asia. Parental myopia remains a critical factor to consider when predicting myopia progression. Progression of myopia was unaffected by restrictions imposed during COVID-19 in Sweden. In addition to ethnicity, lifestyle and adequate educational pressure might be factors keeping prevalence of myopia under control in Scandinavia. Further studies to investigate these hypotheses are warranted. The rate of myopia is increasing in many regions of the world, and the recent lockdowns caused by the COVID-19 pandemic has exacerbated this problem. The highest rates of myopia are from East Asia and are in sharp contrast to the low levels reported from Scandinavia. There is a lack of studies exploring the incidence of myopia in the Scandinavian population. We conducted this study to identify the incidence of myopia among Swedish children and to determine whether the COVID-19 pandemic had any significant effects. This study is the first to report the incidence of myopia and the myopic shift in Scandinavia. The study results showed that myopia and myopic shift were low compared to other parts of the globe. Myopia progression was not affected by the pandemic, perhaps due to Sweden’s avoidance of severe restrictions during the outbreak. Parental myopia was the significant risk factor for the progression of myopia in this cohort of Swedish school children. It is clear from this study’s results that parental myopia is a risk factor for myopia and is an influential predictor to consider in clinical trials that evaluate interventions to slow down the progression of myopia. Outdoor lifestyle and less educational pressure at young ages may be contributing factors to the low prevalence and incidence of myopia in Swedish children. Incidence of myopia was low in Swedish schoolchildren despite COVID-19 pandemic and the associated risk factor was parental myopia and younger age.
Location: United States of America
Location: United Kingdom of Great Britain and Northern Ireland
Location: No location found
No related grants have been discovered for António Macedo.