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Age related changes in the characteristics of the near pupil response.
Vision Res. 2006 Apr; 46(8-9):1393-403.VR

Abstract

Static and dynamic aspects of the near pupil response were studied in human subjects in the age range when accommodative amplitude steadily declines. Dynamic accommodative and pupillary responses to step stimuli were recorded in 66 subjects (ages: 14-45 years). Exponential fits to data provided amplitude, peak velocity and time constants. Accommodative amplitude decreased linearly with age (p < 0.05). Pupil constriction per diopter of accommodative response increased exponentially with age (p < 0.05). The amplitude of pupil constriction for a 2D stimulus decreased linearly with age (p < 0.05) and for a 5D stimulus did not change with age (p = 0.90). The latency of pupil constriction did not change with age (p = 0.65), while the mean peak velocity decreased linearly with age (p < 0.05). An increase in the amount of pupil constriction per diopter of accommodative response, but not per diopter of stimulus amplitude, suggests that the near effort per se does not increase with age. There is a slight reduction in the speed of near pupil response with age.

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

16112706

Citation

Kasthurirangan, Sanjeev, and Adrian Glasser. "Age Related Changes in the Characteristics of the Near Pupil Response." Vision Research, vol. 46, no. 8-9, 2006, pp. 1393-403.
Kasthurirangan S, Glasser A. Age related changes in the characteristics of the near pupil response. Vision Res. 2006;46(8-9):1393-403.
Kasthurirangan, S., & Glasser, A. (2006). Age related changes in the characteristics of the near pupil response. Vision Research, 46(8-9), 1393-403.
Kasthurirangan S, Glasser A. Age Related Changes in the Characteristics of the Near Pupil Response. Vision Res. 2006;46(8-9):1393-403. PubMed PMID: 16112706.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Age related changes in the characteristics of the near pupil response. AU - Kasthurirangan,Sanjeev, AU - Glasser,Adrian, Y1 - 2005/08/19/ PY - 2005/03/29/received PY - 2005/07/05/revised PY - 2005/07/05/accepted PY - 2005/8/23/pubmed PY - 2006/6/30/medline PY - 2005/8/23/entrez SP - 1393 EP - 403 JF - Vision research JO - Vision Res VL - 46 IS - 8-9 N2 - Static and dynamic aspects of the near pupil response were studied in human subjects in the age range when accommodative amplitude steadily declines. Dynamic accommodative and pupillary responses to step stimuli were recorded in 66 subjects (ages: 14-45 years). Exponential fits to data provided amplitude, peak velocity and time constants. Accommodative amplitude decreased linearly with age (p < 0.05). Pupil constriction per diopter of accommodative response increased exponentially with age (p < 0.05). The amplitude of pupil constriction for a 2D stimulus decreased linearly with age (p < 0.05) and for a 5D stimulus did not change with age (p = 0.90). The latency of pupil constriction did not change with age (p = 0.65), while the mean peak velocity decreased linearly with age (p < 0.05). An increase in the amount of pupil constriction per diopter of accommodative response, but not per diopter of stimulus amplitude, suggests that the near effort per se does not increase with age. There is a slight reduction in the speed of near pupil response with age. SN - 0042-6989 UR - https://www.unboundmedicine.com/medline/citation/16112706/Age_related_changes_in_the_characteristics_of_the_near_pupil_response_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0042-6989(05)00337-8 DB - PRIME DP - Unbound Medicine ER -