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Vergence analysis reveals the influence of axial distances on accommodation with age and axial ametropia.
Ophthalmic Physiol Opt. 2010 Jul; 30(4):371-8.OP

Abstract

Despite numerous investigations, the aetiology and mechanism of accommodation and presbyopia remains equivocal. Using Gaussian first-order ray tracing calculations, we examine the contribution that ocular axial distances make to the accommodation response. Further, the influence of age and ametropia are also considered. The data show that all changes in axial distances during accommodation reduce the accommodation response, with the reduction in anterior chamber depth contributing most to this overall attenuation. Although the total power loss due to the changes in axial distances remained constant with increasing age, hyperopes exhibited less accommodation than myopes. The study, therefore, enhances our understanding of biometric accommodative changes and demonstrates the utility of vergence analysis in the assessment of accommodation.

Authors+Show Affiliations

Ophthalmic Research Group, School of Life and Health Sciences, Aston University, Birmingham, B4 7ET, UK. l.n.davies@aston.ac.ukNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20629959

Citation

Davies, Leon N., et al. "Vergence Analysis Reveals the Influence of Axial Distances On Accommodation With Age and Axial Ametropia." Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists), vol. 30, no. 4, 2010, pp. 371-8.
Davies LN, Dunne MC, Gibson GA, et al. Vergence analysis reveals the influence of axial distances on accommodation with age and axial ametropia. Ophthalmic Physiol Opt. 2010;30(4):371-8.
Davies, L. N., Dunne, M. C., Gibson, G. A., & Wolffsohn, J. S. (2010). Vergence analysis reveals the influence of axial distances on accommodation with age and axial ametropia. Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists), 30(4), 371-8. https://doi.org/10.1111/j.1475-1313.2010.00749.x
Davies LN, et al. Vergence Analysis Reveals the Influence of Axial Distances On Accommodation With Age and Axial Ametropia. Ophthalmic Physiol Opt. 2010;30(4):371-8. PubMed PMID: 20629959.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Vergence analysis reveals the influence of axial distances on accommodation with age and axial ametropia. AU - Davies,Leon N, AU - Dunne,Mark C M, AU - Gibson,George A, AU - Wolffsohn,James S, PY - 2010/7/16/entrez PY - 2010/7/16/pubmed PY - 2011/2/25/medline SP - 371 EP - 8 JF - Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) JO - Ophthalmic Physiol Opt VL - 30 IS - 4 N2 - Despite numerous investigations, the aetiology and mechanism of accommodation and presbyopia remains equivocal. Using Gaussian first-order ray tracing calculations, we examine the contribution that ocular axial distances make to the accommodation response. Further, the influence of age and ametropia are also considered. The data show that all changes in axial distances during accommodation reduce the accommodation response, with the reduction in anterior chamber depth contributing most to this overall attenuation. Although the total power loss due to the changes in axial distances remained constant with increasing age, hyperopes exhibited less accommodation than myopes. The study, therefore, enhances our understanding of biometric accommodative changes and demonstrates the utility of vergence analysis in the assessment of accommodation. SN - 1475-1313 UR - https://www.unboundmedicine.com/medline/citation/20629959/Vergence_analysis_reveals_the_influence_of_axial_distances_on_accommodation_with_age_and_axial_ametropia_ L2 - https://doi.org/10.1111/j.1475-1313.2010.00749.x DB - PRIME DP - Unbound Medicine ER -