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A Pilot Study of Perceptual-Motor Training for Peripheral Prisms
Kevin E Houston1, Alex R Bowers1, Xianping Fu2
1Schepens Eye Research Institute, Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA.
Translational Vision Science & Technology
|March 3, 2016
Summary
This study shows a new computer training program significantly improves object localization for hemianopia patients using peripheral prisms (p-prisms). The training enhances visual field expansion adaptation, aiding patients with visual field loss.
Area of Science:
- Ophthalmology
- Neuroscience
- Rehabilitation Science
Background:
- Peripheral prisms (p-prisms) expand visual fields for hemianopia patients but adaptation is poor.
- Patients often mislocalize objects viewed through p-prisms, limiting their effectiveness.
- A novel computerized perceptual-motor training program was developed to improve p-prism adaptation.
Purpose of the Study:
- To evaluate a novel computerized perceptual-motor training program for p-prism adaptation in hemianopia.
- To assess the program's impact on visual localization accuracy and detection in the prism-expanded visual field.
- To determine the durability of training effects over time.
Main Methods:
- Thirteen hemianopia patients with 57Δ oblique p-prisms participated.
- Training involved six 1-hour sessions of reaching and touching peripheral stimuli in driving videos.
- Performance was measured during training and at a 3-month follow-up.
Main Results:
- Significant reduction in touch error for stimuli in the p-prism zone (P=0.01).
- Significant improvement in p-prism zone stimulus detection (P=0.01), from 70% to 95%.
- While reaction times did not change significantly, improvements persisted at 3 months post-training.
Conclusions:
- Computerized training can improve pointing accuracy for hemianopia patients using peripheral prisms.
- The novel software effectively trains visual direction adaptation in patients with hemianopia wearing p-prisms.
- This approach offers a promising avenue for enhancing functional vision in individuals with visual field loss.
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