Enjoy some fun optical illusions
Are you color-blind?? Well here is a simple test to find out!!
Block 1= 58 Block 2 = 18 Block 3 = E Block 4 = 17
What is 20/20 vision?
In 1864 a test for visual acuity (the clarity or sharpness of vision) was devised by Herman Snellen, a Dutch opthalmologist. Using the eyesight of his assistant Snellen created a chart with letters on it. The “snellen” chart has different sized letters on it and forms the basis of modern eye exams. Snellen decided what a person should be able to see when standing 20 feet away from the eye chart. 20/20 vision is a term which means that you can see clearly at 20 feet what a person with normal vision can see. If you have 20/40 vision this means that you must be as close as 20 feet to see what a person with normal vision can see at 40 feet. 20/20 does not mean “perfect” vision, it only indicates the clarity or sharpness of distance vision. You can also have vision that is better than normal vision, for example a person with 20/10 vision can see things at 20 feet what a normal person can see standing 10 feet from the chart.
Watch Brian Regan and his act on going to the eye doctor. Hilarious!!
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Summer hours (Memorial Day- Labor Day)
Monday 8:00-7:00 pm
Tuesday-Thursday: 8:00-4:00 pm
1300 19th St NE
Watertown, SD 57201