Category: Visionex

Here at USANA, you could say we have an eagle eye for good health and we always want to share some eye-opening information. There are hundreds of sayings about our eyes: beauty is in the eye of the beholder, keeping one’s eye on the ball and without batting an eye. A cross-country flight is called a red-eye and having roving eyes can get you divorced. Yet, even with all of these idioms, it’s common for us to overlook proper eye care. When we think of good health, too often we just focus on the inside. For obvious reasons, we focus on our cardiovascular and digestive health, but we rarely discuss how to keep our eyes healthy. This is why USANA’s Visionex® is essential for keeping your eyes fit and focused. Visionex works…

Vitamin C Vitamin C is an antioxidant found in fruits and vegetables. It supports healthy capillaries, gums, teeth, and cartilage. Vitamin C can be found in virtually every cell in the body, and its concentration is significantly higher in the retina than in the blood. Since the human body does not make vitamin C, it must be consumed as part of the diet. Zinc Zinc is a trace mineral that is found in high concentrations in the eye. It plays a critical role in transporting vitamin A to the retina. Zinc deficiency has been linked to poor night vision and cloudy cataracts.  Zinc appears to provide an additive effect of antioxidant protection and helping to promote good visual acuity. Lutein & Zeaxanthin Lutein and zeaxanthin are carotenoids that are selectively transported across the BBB and deposited…

The eye, especially the retina and even more so the macula, is particularly prone to photo- and oxidative-damage. This damage can occur from natural sunlight, artificial light from light bulbs or computer screens, exposure to environmental factors, and oxidants produced as a result of the high metabolic rate of the eye. Over time these insults add up and there is a general decline in visual acuity as we age. Of particular concern are the environmental factors that come in contact with the eye and the damaging rays that enter the eye.  Just like high-intensity light (UV radiation) from the sun can burn and damage our skin, these same rays can also damage structures of the eye. If you think about it, it is an interesting dilemma the eye has to…

he human eye detects radiation (or light) in a specific part of the spectrum we refer to as visible light. The normal human eye is capable of detecting an almost countless variety of colors within this spectrum. Our eyes can form images of objects either directly in front of us or as far as many miles away. Our eyes are so sensitive they can respond to a single photon of light. They can do this because of the high concentration of sensory receptors found in the eye. In fact, our eyes contain over 70% of all sensory receptors in the body. But the eye is only collecting and focusing light. It takes our brain to actually translate the messages the eye is perceiving to be able to “see” the world…

The central nervous system (CNS) consists of the brain, spinal cord, peripheral nerves, and other structures that coordinate and influence the activity of all parts of our body. Our eyes are considered part of the CNS because many parts of the eye actually begin as brain tissue during early embryonic development. Additionally, it takes many nerves and our brain to be able to perceive the light our eyes are taking in as physical objects. The fact that the eyes are part of the CNS is important because all structures of the CNS are protected by something known as the blood-brain-barrier or BBB. The BBB consists of a highly selective, semi-permeable membrane that separates the circulating blood from the fluids and structures of the CNS. The BBB is formed by especially…