Dynamic accommodation response in the presence of astigmatism

Lawrence R. Stark, Niall C. Strang, David A. Atchison

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


It has been suggested that in the presence of astigmatism some individuals make cyclic changes in focus over the astigmatic interval to obtain better visual performance. The aim in the present study was to identify such cyclic accommodative behavior and to characterize the variability of the response in the presence of astigmatism. The dynamic accommodation response in the presence of induced astigmatism was recorded objectively with an infrared optometer in seven young adults. Astigmatism led directly to increased accommodative variability in certain individuals. In two of seven participants there was evidence for aperiodic cyclic accommodative responses between different portions of the astigmatic interval. However, the amplitude of these tracking responses was much smaller than the astigmatic interval.

Original languageEnglish
JournalJournal of the Optical Society of America A
Publication statusPublished - 1 Dec 2003


  • astigmatism
  • accomodation response
  • vision sciences


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