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
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