Silver and Gold Magazine Spring 2015 - Page 25

EYE SEE... Our eyes tend to be the most active group of muscles. The external muscles of the eye are constantly in motion when you’re looking around or focusing on objects or distance, and always repositioning when the head is moving. Within just one hour of reading a book, the eyes make up to 10,000 coordinating movements. Each of your eyes has a small blind spot in the back of the retina where the optic nerve attaches.You don’t notice the hole in your vision because your eyes work together to fill in each other’s blind spot. Photo: Petr Novák, Wikipedia On average, most adults blink every 5 seconds. Total that up and it comes to a whopping 6.5 million times a year! The muscle that controls our blinking is the fastest in the human body. The eyeball of a human weighs approximately 28 grams, or just about one ounce = the weight of 4 quarters. People generally read 25% slower from a computer screen compared to paper. According to a recent study by New York Eye and Ear Infirmary, a tie that is on too tight can increase the risk of Glaucoma in men. S Celebrating  20  years S Having 20/20 vision isn’t the same thing as having “perfect” vision. To have 20/20 vision means to have “average” vision. It means that you can see at 20 feet what an average person can see at 20 feet. People who have 20/10 vis