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Optimizing home-based vision training for convergence insufficiency in young adults using automatic dual rotational
Ya-Yu Chen1, Po-Hao Ternence Chen, Shuan-Yu Huang
1Department of Optometry, Mackay Medical College, New Taipei, Taiwan College of Optometry, Pacific University, Forest Grove, Oregon Department of Optometry, Central Taiwan University of Science and Technology, Taichung, Taiwan Department of Ophthalmology, National Taiwan University Hospital Hsin-Chu Branch, Hsin-Chu, Taiwan Department of Ophthalmology, National Taiwan University Hospital, Taipei, Taiwan.
Home-based visual therapy using automatic dual rotational Risley prisms significantly improved symptoms and visual function in patients with convergence insufficiency over 12 weeks.
Area of Science:
- Ophthalmology
- Vision Science
- Rehabilitation Medicine
Background:
- Convergence insufficiency (CI) is a common binocular vision disorder characterized by symptoms like eye strain and double vision.
- Traditional treatments for CI often require in-office visits, posing accessibility challenges for some patients.
Purpose of the Study:
- To evaluate the efficacy of a novel, mobile phone-operated automatic dual rotational Risley prisms system for home-based visual therapy in individuals with CI.
- To assess the impact of this therapy on visual symptoms and key functional parameters.
Main Methods:
- A prospective, interventional pilot study enrolled 14 participants (aged 19-30) diagnosed with CI.
- Participants were assigned to either a 12-week visual training group (n=10) using the Risley prisms device or a control group (n=4).
- Outcome measures included the Convergence Insufficiency Symptom Survey (CISS), near point of convergence, near exodeviation, and positive fusional vergence, assessed at baseline and follow-up.
Main Results:
- The training group demonstrated significant improvements in CISS scores, positive fusional vergence, near exodeviation, and accommodative convergence/accommodation ratio after 12 weeks (p<0.05 for all).
- Statistically significant improvements were also noted in accommodative and vergence facility.
- No significant changes were observed in the control group, and between-group comparisons favored the training group.
Conclusions:
- Home-based training with automatic dual rotational Risley prisms appears to be a promising therapeutic approach for managing convergence insufficiency.
- The device offers a novel, convenient method for delivering variable prism power, potentially improving patient adherence and outcomes.
- Further research is warranted to confirm these findings and explore long-term efficacy.
