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Age related changes in accommodative dynamics in humans.
Vision Res. 2006 Apr; 46(8-9):1507-19.VR

Abstract

Age related changes in the dynamics of accommodation (far to near focus) and disaccommodation (near to far focus) are reported in this study. Dynamic responses to step stimulus demands from 1D to 6D, in 1D steps, were recorded with a PowerRefractor in 66 subjects in the age range 14-45 years. The accommodative and disaccommodative responses were fit with exponential functions to calculate response amplitude, time constant and peak velocity. The latency of accommodation did not change and the latency of disaccommodation increased with age. For accommodation, time constant increased and peak velocity decreased with age. For disaccommodation, no change in time constant or peak velocity was found with age. The form of the peak velocity vs response amplitude relationship (main sequence) of accommodation changed with age. The differences in the dynamics of accommodation and disaccommodation with age are discussed with reference to the age related changes in the eye leading to presbyopia.

Authors+Show Affiliations

College of Optometry, University of Houston, TX 77204, USA.No affiliation info available

Pub Type(s)

Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16384590

Citation

Kasthurirangan, Sanjeev, and Adrian Glasser. "Age Related Changes in Accommodative Dynamics in Humans." Vision Research, vol. 46, no. 8-9, 2006, pp. 1507-19.
Kasthurirangan S, Glasser A. Age related changes in accommodative dynamics in humans. Vision Res. 2006;46(8-9):1507-19.
Kasthurirangan, S., & Glasser, A. (2006). Age related changes in accommodative dynamics in humans. Vision Research, 46(8-9), 1507-19.
Kasthurirangan S, Glasser A. Age Related Changes in Accommodative Dynamics in Humans. Vision Res. 2006;46(8-9):1507-19. PubMed PMID: 16384590.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Age related changes in accommodative dynamics in humans. AU - Kasthurirangan,Sanjeev, AU - Glasser,Adrian, Y1 - 2005/12/27/ PY - 2005/04/13/received PY - 2005/11/12/revised PY - 2005/11/15/accepted PY - 2005/12/31/pubmed PY - 2006/6/30/medline PY - 2005/12/31/entrez SP - 1507 EP - 19 JF - Vision research JO - Vision Res. VL - 46 IS - 8-9 N2 - Age related changes in the dynamics of accommodation (far to near focus) and disaccommodation (near to far focus) are reported in this study. Dynamic responses to step stimulus demands from 1D to 6D, in 1D steps, were recorded with a PowerRefractor in 66 subjects in the age range 14-45 years. The accommodative and disaccommodative responses were fit with exponential functions to calculate response amplitude, time constant and peak velocity. The latency of accommodation did not change and the latency of disaccommodation increased with age. For accommodation, time constant increased and peak velocity decreased with age. For disaccommodation, no change in time constant or peak velocity was found with age. The form of the peak velocity vs response amplitude relationship (main sequence) of accommodation changed with age. The differences in the dynamics of accommodation and disaccommodation with age are discussed with reference to the age related changes in the eye leading to presbyopia. SN - 0042-6989 UR - https://www.unboundmedicine.com/medline/citation/16384590/Age_related_changes_in_accommodative_dynamics_in_humans_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0042-6989(05)00604-8 DB - PRIME DP - Unbound Medicine ER -