Diurnal variations of amplitude of accommodation in different age groups

Clinical assessment of amplitude of accommodation (AA) involves measuring the ability of the eye to change its optical power and focus on near tasks/objects. AA gradually decreases with increasing age. However, details of age-related diurnal changes in AA are not well known. This study compared diur...

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Veröffentlicht in:PloS one 2019-11, Vol.14 (11), p.e0225754-e0225754
Hauptverfasser: Park, Sun-Mi, Moon, Byeong-Yeon, Kim, Sang-Yeob, Yu, Dong-Sik
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Kim, Sang-Yeob
Yu, Dong-Sik
description Clinical assessment of amplitude of accommodation (AA) involves measuring the ability of the eye to change its optical power and focus on near tasks/objects. AA gradually decreases with increasing age. However, details of age-related diurnal changes in AA are not well known. This study compared diurnal changes in AA in the adolescents, the twenties, and the forties age groups. Measurement of AA using the push-up method was performed in six sessions at two-hourly intervals for 154 subjects (48, 56, 50 subjects for the adolescents, twenties, and forties age groups, respectively); the first measurements were taken from 9:00-10:00 a.m. and the final measurements from 7:00-8:00 p.m. The mean AA was 14.67 D (highest: 16.15 D in the 3:00-4:00 p.m. session, lowest: 13.35 D in the 9:00-10:00 a.m. session) for the adolescent group; 11.13 D (highest: 11.69 D in the 3:00-4:00 p.m. session; lowest: 10.61 D in the 9:00-10:00 a.m. session) in the twenties group; and 5.53 D (highest: 5.80 D in the 1:00-2:00 p.m. session, lowest: 5.11 D in the 7:00-8:00 p.m. session) in the forties age group. The measured AA showed significant difference between sessions; however, diurnal variations were greater in the younger groups. The measured AA was low at the beginning of the day in the adolescents and twenties groups and low at the end of the day in the forties age group. All age groups showed a high AA during the afternoon hours of the day (1:00-4:00 p.m.). Since the difference between each session was larger in younger subjects, AA should be evaluated while taking the age-related diurnal variations into account.
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AA gradually decreases with increasing age. However, details of age-related diurnal changes in AA are not well known. This study compared diurnal changes in AA in the adolescents, the twenties, and the forties age groups. Measurement of AA using the push-up method was performed in six sessions at two-hourly intervals for 154 subjects (48, 56, 50 subjects for the adolescents, twenties, and forties age groups, respectively); the first measurements were taken from 9:00-10:00 a.m. and the final measurements from 7:00-8:00 p.m. The mean AA was 14.67 D (highest: 16.15 D in the 3:00-4:00 p.m. session, lowest: 13.35 D in the 9:00-10:00 a.m. session) for the adolescent group; 11.13 D (highest: 11.69 D in the 3:00-4:00 p.m. session; lowest: 10.61 D in the 9:00-10:00 a.m. session) in the twenties group; and 5.53 D (highest: 5.80 D in the 1:00-2:00 p.m. session, lowest: 5.11 D in the 7:00-8:00 p.m. session) in the forties age group. The measured AA showed significant difference between sessions; however, diurnal variations were greater in the younger groups. The measured AA was low at the beginning of the day in the adolescents and twenties groups and low at the end of the day in the forties age group. All age groups showed a high AA during the afternoon hours of the day (1:00-4:00 p.m.). Since the difference between each session was larger in younger subjects, AA should be evaluated while taking the age-related diurnal variations into account.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>31770414</pmid><doi>10.1371/journal.pone.0225754</doi><tpages>e0225754</tpages><orcidid>https://orcid.org/0000-0001-8388-7820</orcidid><orcidid>https://orcid.org/0000-0002-4387-4408</orcidid><oa>free_for_read</oa></addata></record>
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subjects Accommodation
Accommodation, Ocular - physiology
Adolescent
Adolescents
Adult
Age
Age Factors
Age groups
Amplitudes
Area Under Curve
Biology and Life Sciences
Comparative analysis
Diurnal
Diurnal variations
Humans
Measurement techniques
Medical research
Medicine and Health Sciences
Methods
Middle Aged
Optometry
People and Places
Physical Sciences
Presbyopia
Research and Analysis Methods
ROC Curve
Social Sciences
Studies
Teenagers
Visual Acuity
Young Adult
Youth
title Diurnal variations of amplitude of accommodation in different age groups
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