doi: 10.1097/00006324-198603000-00004.
Eye and head contribution to gaze at near through multifocals: the usable field of view
- PMID: 3963140
- DOI: 10.1097/00006324-198603000-00004
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Eye and head contribution to gaze at near through multifocals: the usable field of view
Am J Optom Physiol Opt.
1986 Mar.
Abstract
Presbyopes show that for targets presented within a 28 degrees clear field of view, gaze is accomplished by head and eye movements with head movements making an average contribution of 24%. A clear field of view which incorporates the factor of segment width provides an underestimation because of the factor of head movements. By including the effect of head movements, a fixed segment width provides a much wider clear field of view which we term the usable field of view.
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