title: The influence of eye movement on soft contact lens visual performance.
abstract: An apparently undocumented aspect of the correction provided by soft hydrophilic contact lenses, either at the fitting stage or in wear, is the influence of eye movement on visual performance. Using a televised visual discrimination task both spectacle (control) and soft contact lens (experimental) monocular visual performance was assessed in a group of human subjects (N = 5) under conditions of stationary fixation and subsequent to a defined 15 deg ocular excursion. For this subject group, analysis of variance revealed no statistically significant difference (P > 0.9) between visual performance under the control and any of the experimental conditions: the group psychometric functions were similar in all cases, regardless of the direction--or absence--of a deliberate eye movement. It is concluded that even in new and inexperienced soft contact lens wearers, provided that the lens fit is optimum, eye movement does not have a significant influence on the visual performance of the eye/lens system.
authors.forename: J S
authors.initials: JS
authors.lastname: Pointer