The effect of modulating ocular depth of focus upon accommodation microfluctuations in myopic and emmetropic subjects

Research output: Contribution to journalArticle

Abstract

The magnitude of accommodation microfluctuations increases in emmetropic subjects viewing low luminance targets or viewing a target through small artificial pupils. Larger microfluctuations reported in myopia may result from an abnormally large depth of focus (DoF). The effect of modulating the size of the DoF has not been investigated in myopic subjects and may help to explain the cause of the increased DoF. Accommodation microfluctuations were recorded under two experimental conditions. Firstly, 12 emmetropes (EMMs), and 24 myopes (MYOs) viewed a Maltese Cross target with luminance levels of 0.002, 0.2, 6 and 600 cd/m2 and in darkness, and second, 14 EMMs and 16 MYOs viewed a Maltese Cross target through pupil diameters of 0.5, 1, 2, 3, 4 and 5 mm presented in Maxwellian view. The magnitude of the accommodation microfluctuations increased significantly with a target luminance of 0.002 cd/m2 (p <.03) and pinhole diameters of p <.05).

Original languageEnglish
Pages (from-to)211-218
Number of pages8
JournalVision Research
Volume49
Issue number2
DOIs
Publication statusPublished - 1 Jan 2009

Keywords

  • microfluctuations
  • optometry
  • myopia
  • vision sciences

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