title: The measurement of adaptation of tonic accommodation under two open-loop conditions.
abstract: Pre- and post-task tonic accommodation (TA) was measured using an objective infra-red optometer under two open-loop conditions: a darkroom and a bright empty-field (60 cd m-2). The task was of 10 minutes' duration and was located at -1, -3 and -5 D. Post-task TA was measured immediately after the task and over a period of 90 s. Mean data for the group of 10 young men subjects showed that the open-loop condition adopted had no significant influence on the post-task regression patterns of TA towards pre-task values. Three subjects did, however, show significantly more sustained increases in post-task TA for the bright-field condition; one markedly so. Conversely, two subjects showed more pronounced post-task shifts for the darkroom condition.
authors.affiliation: Department of Vision Sciences, Aston University, Birmingham, UK.
authors.forename: M A
authors.initials: MA
authors.lastname: Bullimore
authors.forename: B
authors.initials: B
authors.lastname: Gilmartin
mesh_terms: D000065:Accommodation, Ocular; D000221:Adaptation, Ocular; D000328:Adult; D003624:Darkness; D006801:Humans; D008027:Light; D008297:Male; D013997:Time Factors