Amsler Grid Testing Let's get an idea of your central vision Test one eye at a time. If you wear glasses or contact lenses wear them for the test Hold the screen about 40 cm or 15 inches away Determine if there are dark spots or not. Look at the red dot in the center and see if any kind of distortion or wavy / blurry lines are visible. Close your Left Eye Which square is different? Wavy or Blurry Lines Dark Spots Nothing its a clear grid with red spot Poor Left Eye Poor Left Eye Good Left Eye Close your Right Eye Which square is different? Wavy or Blurry Lines Dark Spots Nothing its a clear grid with red spot Poor Right Eye Poor Right Eye Good Right Eye