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A Novel Test of Dynamic Visual Function: Comparison Between Presbyopic and Non-Presbyopic Individuals
Bingqing Sun1,2,3,4, Yuhao Ye1,2,3,4, Xingtao Zhou1,2,3,4
1Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, Shanghai 200031, China.
Diagnostics (Basel, Switzerland)
|June 26, 2026
Summary
Presbyopia impairs binocular integration at near distances, with higher ADD levels worsening this effect. Dynamic visual function testing reveals distance-dependent impacts on vision in presbyopic individuals.
Area of Science:
- Ophthalmology
- Vision Science
- Optometry
Background:
- Limited evidence exists on multi-distance visual function assessment in presbyopia.
- Presbyopia affects dynamic binocular visual function, necessitating further investigation.
Purpose of the Study:
- Compare dynamic binocular visual function between presbyopic and non-presbyopic (NP) individuals at various distances.
- Evaluate the impact of additional power (ADD) on dynamic sharpness discrimination, binocular integration, and dynamic stereopsis in presbyopia.
Main Methods:
- A cohort of 54 presbyopic and 77 NP participants were tested.
- A dichoptic rotating ring system with red-blue anaglyph glasses assessed visual function at 0.4 m, 0.7 m, 1 m, and 3 m.
- Generalized linear models (GLM) were used to analyze data, controlling for confounders like age and spherical equivalent (SE).
Main Results:
- No significant difference in dynamic sharpness discrimination between groups.
- Presbyopic individuals showed significantly lower binocular integration rates at near-to-intermediate distances (0.4m-1m) compared to NP individuals.
- Higher ADD levels in presbyopia correlated with significantly reduced binocular integration across all tested distances.
Conclusions:
- Dynamic testing reveals ADD-dependent impairment of binocular integration in presbyopia.
- Binocular integration deficits are most pronounced at near-to-intermediate viewing distances.
- This study highlights the importance of assessing dynamic visual function across multiple distances in presbyopia management.
