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Improving awareness of peripheral visual field using sectorial prism.
Journal of the American Optometric Association
|November 24, 1999
Summary
Sectorial prisms can improve peripheral awareness for patients with homonymous hemianopsia. This visual field enhancement aids in daily activities, offering functional vision improvement for selected individuals.
Area of Science:
- Optometry
- Ophthalmology
- Neuroscience
Background:
- Complete homonymous hemianopsia presents a significant challenge to peripheral visual field awareness.
- Traditional management strategies may not fully restore functional vision in these patients.
Purpose of the Study:
- To investigate the efficacy of ground-in sectorial prisms in enhancing peripheral visual field awareness.
- To assess the impact of sectorial prism spectacles on activities of daily living (ADL) in patients with homonymous hemianopsia.
Main Methods:
- A prospective case series involving nine patients diagnosed with complete homonymous hemianopsia.
- Patients completed standardized ADL questionnaires before and after the intervention period using sectorial prism spectacles.
Main Results:
- Seven out of nine patients reported a subjective, quantitative improvement in their ADL scores.
- Two patients did not experience a reported improvement in their functional vision or ADL performance.
Conclusions:
- Hemianopic prism spectacles, combined with targeted training, show potential for improving functional vision in patients with homonymous hemianopic visual-field loss.
- Sectorial prisms may enhance peripheral awareness by promoting more efficient visual scanning techniques, thereby improving ADL outcomes.