Lag of Accommodation Between 5 and 60 Years of Age.
Purpose: Assessment of the accommodative response is an essential part of the optometric examination. In the clinic, the practitioner needs to determine the response to a given stimulus, typically positioned at the habitual working distance. This study used dynamic retinoscopy to examine the effect...
| Publicado en: | Optometry & Visual Performance Vol. 5; no. 3; pp. 103 - 109 |
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| Autores principales: | , , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
Optometric Extension Program
Jun2017
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=124469702&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 124469702 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 23253479 HOOW jtl: Optometry & Visual Performance issn: 23253479 maglogo: N pubinfo: dt: Jun2017 vid: 5 iid: 3 pid: 46881 pub: Optometric Extension Program place: Lutherville Timonium, Maryland artinfo: ui: 124469702 124469702 124469702 124469702 ppf: 103 ppct: 6 formats: tig: atl: Lag of Accommodation Between 5 and 60 Years of Age. aug: au: León, Alejandro Rosenfield, Mark Estrada, Jorge Mario Medrano, Sandra Milena Márquez, Mónica Marlene affil: Universidad de la Salle, Bogotá D. C. Colombia. sug: subj: Ocular Physiology Physiology Reference Values Refractive Errors Named Groups by Age Aging Presbyopia Middle Age Adult One-Way Analysis of Variance Linear Regression Analysis of Variance Descriptive Statistics Post Hoc Analysis Regression Data Analysis Univariate Statistics Data Collection Sensitivity and Specificity Middle Aged: 45-64 years Adult: 19-44 years ab: Purpose: Assessment of the accommodative response is an essential part of the optometric examination. In the clinic, the practitioner needs to determine the response to a given stimulus, typically positioned at the habitual working distance. This study used dynamic retinoscopy to examine the effect of age on both the mean and normal range of accommodative lag to a 2.50D accommodative stimulus. Method: The lag of accommodation was assessed in 1296 subjects between 5 and 60 years of age using either the Nott technique (for subjects under 40 years of age) or monocular estimate method (MEM) retinoscopy (for subjects over 40 years of age). Results: No significant change in lag of accommodation as a function of age was observed for subjects under 40 years of age. The mean lag in this age group was 0.54D, with almost all subjects having lags between 0 and 1.00D. A marked increase in accommodative lag occurred after 40 years of age, with the accommodative response reaching zero by 54 years of age. The effect of age was best described by an exponential function having the equation: lag = 0.945 - (0.057*age) + (0.0016*age2). Accommodative lag did not vary significantly with the type of underlying refractive error. Conclusions: The accommodative response to a 2.50D stimulus remained constant until 40 years of age, with a mean value of approximately 0.50D. Subsequently, a marked increase in accommodative error was observed, concurrent with the onset of clinical presbyopia. Dynamic retinoscopy provides a simple technique for quantifying accommodation in the clinical setting. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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