Orange Ribbon. Leukemia Inspirational words on a butterfly ribbon design for shirts, apparel and gifts with words of hope, faith, courage, love, resilient, fight, support and awareness Ideal for the Leukemia survivor, warrior and advocates.
Generally, the preferred viewing distance is between 20 and 40 inches (50 and 100 cm) from the eye to the front surface of the computer screen (Figure 1). NOTE: text size may need to be increased for smaller monitors. Provide adequate desk space between the user and the monitor (table depth).
The normal sight is 20/20. The first number is the distance (20 feet) from the eye chart. The second number is the distance from which a normal eye sees a letter on the chart clearly. Someone with a visual acuity of 20/20 can see certain sized letters at a distance of 20 feet. Someone with a visual acuity of 20/40 only sees letters at 20 feet that a normal eye is able to see at 40 feet.