The Accommodation Response and Facility between Children and Young Adults

Abstract

<jats:p>Tonic accommodation decreased with age among children. In young adults, late-onset myopia will develop due to occupational near vision demands. This study aims to investigate the accommodation response and facility between children and young adults, in emmetrope (non-myopic) and myope group. The accommodation response and facility of young adults and children were measured using monocular estimation method (MEM), monocular accommodative facility (MAF) and binocular accommodative facility (BAF) with an exposure of near task for 15 minutes. Near task has significantly increased the lag of accommodation in all groups (p&lt;0.05). However, the accommodation facility was not affected by near work in all groups (p&gt;0.05). Keywords: accommodation response, accommodation facility, myopes, emmetropes. eISSN: 2398-4287© 2020. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open access article under the CC BYNC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning &amp; Surveying, Universiti Teknologi MARA, Malaysia. DOI: https://doi.org/10.21834/ebpj.v5i14.2168</jats:p>

Evaluation of convergence, accommodation and fusional vergence in pre-presbyopes with asthenopia

“…25 The present study was conducted in the African population; the lower values could be because of the effect of the environment on accommodation, as cited in many previous studies. 1,2,3,4,5,6,7,8,9,10 The present study showed that positive and negative fusional vergence were not significantly connected with age at p = 0.109 and p = 0.355, respectively. These results agreed with a study conducted by Alrasheed and Adlakhil 27 among Sudanese exophoric patients aged between 10 and 30 years; they showed no association between ageing and fusional vergence amplitudes.…”

“…2 Presbyopia is called early, emerging, or premature when the symptoms occur before the age of 40 years. 1,2 Previous studies 8,9,10 have found that the ability to accommodate decreases as children and adults grow. Additionally, Woo 9 reported that near VA is significantly worse compared to distance VA, even in children with mild or moderate visual impairment (VI), primarily because of the impact of poor vision on accommodation amplitude.…”