Prism intervention may help patients with spatial neglect. In a recent study, seven patients with chronic unilateral spatial neglect used prismatic glasses over 8 weeks, and researchers evaluated eye movement, intentional spatial bias, and regional cerebral blood flow before and after the study.

After the 8-week intervention, eye movements on the neglected side improved significantly, and intentional spatial bias was corrected. Also, the researchers noted a significant increase in blood flow at the parietal cortex, pericallosal area of the left hemisphere. They concluded that prism intervention may be a valuable way of activating important areas of the brain in these patients.

Source: Shiraishi H, et al. Long-term effects of prism adaptation on chronic neglect after stroke. NeuroRehabilitation. 23(2):137-151, 2008.

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