Title

Age and the amplitude of accommodation measured using dynamic retinoscopy

DOI

https://doi.org/10.1111/opo.12244

Document Type

Article

Publication Date

1-1-2016

Publication Title

Ophthalmic and Physiological Optics

Abstract

Purpose: Dynamic retinoscopy (DR) is a procedure for assessing the accommodative response using a standard clinical instrument. The present study compared measurements of the amplitude of accommodation (AA) obtained using this technique with two subjective methods (modified push-down and minus lens). Additionally, the expected ranges for AA when measured by DR were determined. Method: AA was measured in 1298 subjects between 5 and 60 years of age using the three techniques described above. Subjects were grouped into 5-year bins, and a descriptive univariate analysis of the data performed. Goodness-of fit plots were constructed to examine the overall model fit. Centile curves were calculated from the final model. Results: Mean values of AA obtained using DR were significantly lower than for the two subjective techniques. For the DR findings, no significant change was observed between 5 and 19 years of age (mean AA = 8.3 D) and between 45 and 60 years of age (mean AA = 0.6 D). AA values as a function of age were best fit by the polynomial regression equation: logAA = 1.93 + 0.49(age) − 0.19(age) . Conclusion: Measurements of AA determined using DR are significantly lower than the normative subjective findings published previously. This difference is at least partly due to the depth-of-field of the eye. These norms markedly overestimate accommodative responsivity. DR provides a simple technique for quantifying accommodation in the clinical setting. 2

Volume

36

Issue

1

First Page

5

Last Page

12

ISSN

02755408

PubMed ID

26353999

Identifier

SCOPUS_ID:84988624669

Documento original

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