Related Experiment Video
Updated: Mar 28, 2026
Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
Published on: July 21, 2020
Contribution of binocular vision to the performance of complex manipulation tasks in 5-13years old visually-normal
Fatimah Alramis1, Eric Roy1, Lisa Christian2
1Department of Kinesiology, University of Waterloo, 200 University Ave. W., Waterloo N2L 3G1, Ontario, Canada.
Insights
Binocular vision significantly aids fine motor skills like bead-threading in children. Performance declines more under monocular viewing, especially for younger kids, highlighting vision
Area of Science:
- Developmental psychology
- Neuroscience
- Ophthalmology
Background:
- Visuomotor coordination and binocular vision (e.g., stereoacuity, vergence control) improve through childhood.
- The relationship between binocular vision development and fine manipulation skills remains understudied.
Purpose of the Study:
- To investigate how binocular and monocular viewing conditions affect complex manipulation task performance in children.
- To determine the age and task dependency of binocular vision's role in fine motor skills.
Main Methods:
- A cross-sectional study involving 52 children aged 5–13 years.
- Children performed peg-board and bead-threading tasks under both binocular and monocular viewing.
- Performance differences between viewing conditions were analyzed.
Main Results:
- Binocular viewing significantly enhanced performance on the bead-threading task compared to the peg-board task.
- Younger children (5–13 years) exhibited the largest performance decrease under monocular viewing for bead-threading.
- The impact of binocular vision on fine manipulation is dependent on the specific task and the child's age.
Conclusions:
- Binocular vision plays a crucial, task- and age-dependent role in children's fine manipulation abilities.
- Findings are relevant for assessing visuomotor skills in children, particularly those with abnormal binocular vision (2-3% of children).
Abstract:
Individual studies have shown that visuomotor coordination and aspects of binocular vision, such as stereoacuity and dynamic vergence control, continue to improve in normally developing children between birth and early teenage years. However, no study has systematically addressed the relationship between the development of binocular vision and fine manipulation skills. Thus, the aim of this cross-sectional study was to characterize performance of complex manipulation tasks during binocular and monocular viewing. Fifty-two children, between 5 and 13years old, performed 2 manipulation tasks: peg-board and bead-threading under randomized viewing conditions. Results showed that binocular viewing was associated with a significantly greater improvement in performance on the bead-threading task in comparison to the peg-board task and the youngest children showed the greatest decrement in task performance under the monocular viewing condition when performing the bead-threading task. Thus, the role of binocular vision in performance of fine manipulation skills is both task- and age-dependent. These findings have implications for assessment of visuomotor skills in children with abnormal binocular vision, which occurs in 2-3% of otherwise typically developing children.
