<abstract xmlns="http://www.w3.org/1999/xhtml"><p> In children, intensive near-work affects the accommodation system of the eye. Younger children, due to anatomical parameters, read at smaller distance than older children and we can expect that the accommodation system of younger can be affected more than that of older children. We wanted to test this hypothesis. Some authors showed that the norms of amplitude of accommodation (AA) developed by Hofstetter (1950) not always could be applied for children. We also wanted to verify these results. A total of 106 (age 7-15) children participated in the study. Distance visual acuity was measured for all children and only data of children with good visual acuity 1.0 or more (dec. units) were analysed (73 children). Accommodative amplitude was measured before and after lessons using subjective push-up technique (with RAF Near Point Ruler). The results showed that the amplitude of accommodation reduced significantly (p &lt; 0.05) during the day and decrease of AA was similar in different age groups (about ~0.70 D). Additional measurements are needed to verify that the observed changes in AA were associated with fatigue effect. The results showed lower accommodation values compared to average values calculated according to the Hofstetter equation (p &lt; 0.05).</p></abstract>

In children, intensive near-work affects the accommodation system of the eye. Younger children, due to anatomical parameters, read at smaller distance than older children and we can expect that the accommodation system of younger can be affected more than that of older children. We wanted to test this hypothesis. Some authors showed that the norms of amplitude of accommodation (AA) developed by Hofstetter (1950) not always could be applied for children. We also wanted to verify these results. A total of 106 (age 7-15) children participated in the study. Distance visual acuity was measured for all children and only data of children with good visual acuity 1.0 or more (dec. units) were analysed (73 children). Accommodative amplitude was measured before and after lessons using subjective push-up technique (with RAF Near Point Ruler). The results showed that the amplitude of accommodation reduced significantly (p < 0.05) during the day and decrease of AA was similar in different age groups (about ~0.70 D). Additional measurements are needed to verify that the observed changes in AA were associated with fatigue effect. The results showed lower accommodation values compared to average values calculated according to the Hofstetter equation (p < 0.05).

Accommodative Amplitude in School-Age Children

Proceedings of the Latvian Academy of Sciences. Section B. Natural, Exact, and Applied Sciences.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Accommodative Amplitude in School-Age Children"}

In children, intensive near-work affects the accommodation system of the eye. Younger children, due to anatomical parameters, read at smaller distance than...

Accommodative Amplitude in School-Age Children

Published Online: Nov 14, 2017

Page range: 387 - 391

Received: Nov 12, 2016

Accepted: Jul 19, 2017

DOI: https://doi.org/10.1515/prolas-2017-0065

Keywords
accommodative amplitude, visual fatigue, school-age children

© by Gatis Ikaunieks

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Accommodative Amplitude in School-Age Children

Published Online: Nov 14, 2017

Page range: 387 - 391

Received: Nov 12, 2016

Accepted: Jul 19, 2017

DOI: https://doi.org/10.1515/prolas-2017-0065

Keywordsaccommodative amplitude, visual fatigue, school-age children

© by Gatis Ikaunieks

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
accommodative amplitude, visual fatigue, school-age children