Eye chart smaller symbols until the person cannot identify the symbols. The smallest symbols that can be reliably identified is considered the person's visual acuity. The Snellen chart is the most widely used. Alternative types of eye charts include the logMAR chart, Landolt C, E chart, Lea test, Golovin–Sivtsev table, the Rosenbaum chart, and the Jaeger chart. Charts display several rows of optotypes, which are standardized symbols for testing vision. Optotypes are usually letters, numbers, or geometric symbols. Each row of the chart depicts optotypes of a different size. Typically the largest optotypes are in the top row. The optotypes become progressively
Unite For Sight Unite For Sight Unite for Sight is a 501(c)(3) non-profit organization founded in 2000 by Jennifer Staple-Clark specializing in healthcare delivery to communities around the world. The organization invests human and financial resources in local eye clinics in Ghana, Honduras, and India to eliminate patient barriers to care. As of January 2017, Unite for Sight has assisted more than 2.4 million people worldwide and provided over 97,000 vision-restoring surgeries. The Global Impact Corps is a volunteer abroad program that places students and professionals with Unite For Sight’s local eye clinic partners. After completing global health training, Global Impact Fellows travel