Snellen Eye Chart 8 Line is an effective visual acuity chart that is used to conduct accurate tests for the eyes at health institutions such as hospitals, clinics, optical centers, and other places where eye exams are done. The chart has eight lines, which have different sizes of letters on them to be used when conducting a test on one’s ability to see things from a distance and whether they have any vision problem. This chart is made using quality and durable material that makes it visible and durable.