You may have heard about infrared. But do you know what it is? Infrared is a form of light. But infrared light has longer wave lengths than our eyes are capable of seeing. So infrared is a case of invisible light. And infrared light is medically useful.

Medical professionals say, too much dietary sodium can raise your blood pressure. Not enough sodium can weaken your adrenal glands and cause fatigue.

As we get older, one of the things many of us have to face is a loss in visual acuity. That means you can’t see all that well. And it gets harder and harder to see those small lines on the eye chart.