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Effects of age in the dynamic components of accommodation

Poster Details

First Author: A.Moulakaki GREECE

Co Author(s):    R. Montés-Micó   J. Esteve-Taboada   D. Madrid-Costa   T. Ferrer-Blasco     

Abstract Details



Purpose:

The dynamic components of accommodation (i.e. latency) was studied in relation to age onset, in order to create a model identifying any age changes and test the influence of accommodative Intra-Ocular Lenses (IOLs) to this component.

Setting:

University of Valencia, Valencia, Spain.

Methods:

An infrared optometer was employed to objectively assess the dynamic monocular components of accommodation, such as latency, to 20 visually normal human eyes aged from 21 to 50 years. A higher step stimulus (~2.0D) was used to young subjects, while the same step size was decreased for older individuals. Abrupt changes (less than 100 ms) were provided using high contrast target letters (~90%). To all subjects refractive tests were performed to correct their refractive error. Then, a commercial aberrometer (IRX-3, Imagine Eyes) and an adaptive optics visual simulator (crx-1, Imagine Eyes) was used to measure and simulate the IOLs' aberration pattern, respectively. Data was extracted for analysis using SPSS Microsoft Software.

Results:

The latency in accommodative response progressively changes with increasing age. This effect is attributed to central neural processing delay and decrease in sensitivity of cone photoreceptors. On the other hand, it was supposed that accommodative IOLs influence the same dynamic component of accommodation, as it happens to the latency of accommodation in presbyopic eyes. However, accommodative IOLs seemed to be positively effective to the latency of eye's accommodative response.

Conclusions:

These results show that in older eyes the latency in accommodation response is quite different than that in younger eyes. While, the effects of an accommodative IOL appear to be limited. FINANCIAL INTEREST: NONE

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