Eye chart smaller towards the bottom of the chart. The person removes any glasses or contact lenses, and stands or sits a standardized distance from the chart (e.g., 20 feet for the Snellen chart). The person is then asked to identify the optotypes on the chart, starting with large rows and continuing to smaller rows until the optotypes cannot be reliably identified any more. The row in which the person can reliably identify symbols defines the visual acuity. One eye is tested at a time. Practically, this is accomplished by covering the other eye with a hand, piece of paper, or a
Doctor of Letters Doctor of Letters Doctor of Letters (D.Litt., Litt.D., D. Lit., or Lit. D.; Latin ' or ') is an academic degree, a higher doctorate which, in some countries, may be considered to be equal to the Ph.D. and equal to the Doctor of Science (Sc.D. or D.Sc.). It is awarded in many countries by universities and learned bodies in recognition of achievement in the humanities, original contribution to the creative arts or scholarship and other merits. When awarded without an application by the conferee, it is awarded as an honorary degree. In the United Kingdom, Australia, India and the Republic