Eye chart number). The denominator indicates the distance in feet at which a person with normal vision could stand to correctly identify the same symbols identified by the person tested. For example, a visual acuity of 20/20 is considered normal. Numerous types of eye charts exist and are used in various situations. For example, the Snellen chart is designed for use at 6 meters or 20 feet, and is thus appropriate for testing distance vision. There is often also a need to test a subject's vision at near or occupational tasks (such as reading or computer use). For these situations, a Rosenbaum
Doctor of Letters French universities. Before the 1950s, the now-abolished "Doctorat d'État" degree was called "Doctorat ès lettres" (in France, "letters" is equivalent to "humanities"). The highest educational attainment at Sanskrit Colleges in India is the "Vidya Vachaspati", legally recognized as the equivalent to the Western D.Litt. Enrollment in a "Vidya Vachaspati" program generally requires both having published works and the previous attainment of a "Vidya Vairidhi" degree, equivalent to a PhD. 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