Changes in the static accommodation response with age

A transverse study of the monocular, steady-state accommodation response/st imulus curves for 49 normal subjects with ages between 17 and 49 years show s that the slope of the curve reduces only slowly with age up to about 40 y ears and then declines rapidly as complete presbyopia is approached. Such b ehaviour appears to result from the accommodation system changing its chara cteristics with age to make optimal use of the available objective amplitud e of accommodation and the depth-of-focus of the eye. (C) 2000 The College of Optometrists. Published by Elsevier Science Ltd. All rights reserved.