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Published on: March 17, 2023
Visual-auditory intervention for children with cerebral vision impairment (CVI)
Natalia Dawson Kelly1,2, Meri Vukicevic1, Konstandina Koklanis1
1Discipline of Orthoptics, La Trobe University, Melbourne, Australia.
Insights
This study shows that a visual-auditory intervention program significantly improved visual function and processing in children with cerebral visual impairment (CVI). The findings suggest this intervention is a promising rehabilitation technique for CVI.
Area of Science:
- Ophthalmology
- Pediatric Neurology
- Rehabilitation Science
Background:
- Cerebral visual impairment (CVI) affects visual function and processing in children.
- Current rehabilitation strategies for CVI require further evidence-based development.
Purpose of the Study:
- To evaluate a visual-auditory intervention program for improving fixation in children with CVI.
- To assess the intervention's impact on other visual functions and processing abilities.
- To explore relationships between treatment parameters and outcomes.
Main Methods:
- Retrospective observational study of 22 children with CVI.
- 12-month tailored, fortnightly visual-auditory interventions.
- Pre- and post-intervention orthoptic vision assessments measuring fixation, acuity, contrast sensitivity, visual attention, crowding, and response latency.
Main Results:
- Statistically significant improvements were observed in all measured visual function and processing variables post-intervention.
- Key improvements included fixation duration (r = -.61), visual attention (r = -.56), and visual crowding (r = -.62).
- Significant correlations were found between fixation duration and other visual parameters.
Conclusions:
- Visual-auditory intervention shows promise as a rehabilitation technique for children with CVI.
- The intervention effectively improved visual function and processing abilities.
- Further research is needed to build a stronger evidence base for this approach.
Purpose:
This is a proof of concept study that aims to evaluate a visual-auditory intervention program on fixation in children with cerebral visual impairment (CVI). Secondary aims include evaluating the effectiveness of the intervention on other visual functions and processing and exploring potential relationships between treatment parameters.
Methods:
This study is a retrospective observational review of children with CVI who underwent tailored, fortnightly visual-auditory interventions for 12 months. Participants had a comprehensive orthoptic vision assessment before intervention and at 12-months. Personalized fortnightly visual-auditory training and homework aimed at improving visual and visual processing functions were implemented. Visual function outcomes included fixation duration, fixation behavior and re- fixation patterns, distance grating acuity, near object detection, and contrast sensitivity. Observed visual processing outcomes included visual attention, visual crowding, and visual response latency. The median number of training sessions received was 17.41 (IQR = 15.25,18).
Results:
This study included 22 children with CVI (median age 29.15mo, range 7.37mo-17.17 yrs, 9 males, 13 females). There were statistically signifi cant diff erences between all pre- and post-training parameters. Improvements were noted in all assessment variables, specifi cally fixation duration (Z = -4.05, p =<.001, r = -.61), fixation behavior (Z = -3.92, p =<.001, r = -.59), grating acuity (Z = -3.48, p = <.001, r = -.52), near object detection (Z = -2.97, p = .003, r = -.45), contrast sensitivity (Z = -3.47, p=<.001, r = -.52), visual attention (Z = -3.74, p =<.001, r = -.56), visual crowding (Z = -4.14, p =<.001, r = -.62) and visual response latency (Z = -3.83, p =<.001, r = -.58). There were moderate to strong and signi cant correlations between xation duration and xation behavior, distance vision, near object detection, visual crowding, and visual response latency.
Conclusion:
This proof of concept study indicates that visual-auditory intervention is a promising rehabilitation technique to improve visual function and visual processing ability. Future research should focus on further developing an evidence base for this intervention.
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