Higher Lutein Levels Improve Visual Function in Long-Term Computer Display Light Exposure
Published in the British Journal of Nutrition, a study by Chinese researchers examined the effect of different doses of lutein supplementation on visual function in subjects with long-term computer display light exposure.
The 12-week study included 37 young adults who were regularly exposed to long-term computer display light. They were randomly assigned to one of three groups: lutein at 6 mg/day (L6); lutein at 12 mg/day (L12); or placebo. Serum lutein and visual performance and acuity were measured at the beginning and end of the trial.
After 12 weeks of lutein supplementation, serum lutein concentrations increased significantly in both treatment groups, and slightly more in group L12. Contrast sensitivity in Groups L6 and L12 increased with supplementation, and statistical significance was reached at most visual angles of Group L12. Researchers also noted a trend toward increased visual acuity in group L12.
This study showed that in young adults exposed to long-term computer screen display light, a higher intake of lutein may have beneficial effects on visual performance, especially in contrast sensitivity.