Envision Eye Care, a local Marion, VA ete care practice, proudly unveiled, this week, its latest technological advance in caring for the eye health of its patients, the Quantifeye MPOD test. In explaining some of the basics of the test and what it means, Dr. Susan Keene of Envision Eye Care says, "The MP in 'MPOD' stands for macular pigment, which is a yellow colored spot found in the area of the retina responsible for your central and detail vision, known as the macula. Made up of two very unique substances called lutein and zeaxanthin, macular pigment acts as a sort of 'internal sunglasses,' playing an extremely important part when it comes to protecting the macula from the harmful effects of blue light, which comes largely from electronics such as smart phone, television and computer screens. It also helps to maintain the function of the macula."