Provide practical home and patient room visits using tools such as the Pocket Snellen Eye Chart, which includes a pupil gauge and instructions. It has dimensions that make it suitable for most room sizes. The patient should stand 6 feet away from the chart to ensure consistent results. The rows of letters of the Snellen eye test chart decrease in size so that medical workers can test patients' eyesight efficiently., Snellen Eye Chart 4 3/4" X 7"