The Snellen Chart with Red Green Lines is a specialized eye chart that is designed to test for color blindness in addition to visual acuity. The chart features red and green lines in addition to the traditional letters of the Snellen chart, which allows for the assessment of both color vision and visual acuity in a single test. The Snellen Chart with Red Green Lines is a standardized eye chart that is used to test visual acuity and color vision in patients. The chart features a series of lines of letters in varying sizes, as well as red and green lines that are arranged in a specific pattern. The examiner holds the chart at a distance of 20 feet from the patient, and the patient is asked to read the letters aloud and identify the orientation of the colored lines. The addition of red and green lines to the traditional Snellen chart allows for the assessment of color vision in addition to visual acuity. The chart is particularly useful for diagnosing red-green color blindness, which is the most common form of color blindness.