Two Studies in Humans Confirm Crucial Role of Lutein and OPTISHARP (zeaxanthin) for Improved Vision in Healthy People

05/09/06 Two recent studies from the Applied Vision Research Centre in London have reported that supplementation with and OPTISHARP (zeaxanthin) can improve visual acuity.

The first study, a placebo controlled human trial, measured three key determinants of visual performance. These were "wave front aberration", "light scatter" and "contrast acuity thresholds". Wave front aberration measures the distortion of the image on the retina, while light scatter measures how sharply the eye can focus on a point of light. Contrast acuity thresholds measure the ability of the eye to distinguish between different degrees of contrast, for example by identifying light grey shapes on a white background. This is considered a more accurate indicator of visual performance than the eye charts used by most opticians.

All three parameters improved significantly in people supplemented with lutein and OPTISHARP confirming the crucial role these carotenoids play in visual acuity. The study also found that supplementation with lutein and OPTISHARP improved vision in low or "mesopic" light conditions.

The second study carried out by the same research group investigated the effect of lutein and OPTISHARP on colour vision. This was carried out by measuring "human chromatic discrimination sensitivity", the ability of the human eye to differentiate between colours. The results demonstrate that lutein and OPTISHARP can improve colour vision.

As part of its continuous commitment to eye health, DSM Nutritional Products has launched a website, www.optisharp.com that provides a wealth of information about this ingredient. The website is available in English, German, French, Spanish and Portuguese and includes product profiles and links to scientific studies on the benefits of OPTISHARP in maintaining eye health.