Eye chart chart or Jaeger chart can be used. While the Snellen chart remains the default, some authors have argued that the logMAR chart is superior. The logMAR chart presents the same number of symbols on each line, uses a typeface with letters that are equally legible at various sizes, and by varying the symbol size logarithmically, it is easier to use at nonstandard distances. As a consequence of these improvements, the logMAR chart has been proposed as a more reliable tool for measuring visual acuity. However, the logMAR chart has not yet been widely adopted. It can be difficult to measure
The 13th Letter The 13th Letter The 13th Letter is a 1951 American film noir mystery film directed by Otto Preminger. The film is a remake of the French film "Le Corbeau" ("The Raven", 1943) directed by Henri-Georges Clouzot. Doctor Pearson (Michael Rennie), who works at a Canadian hospital in the province of Quebec, receives a series of poison pen letters. More letters, all signed with the mysterious picture of a feather, are delivered to others in the small Canadian town. Cora Laurent (Constance Smith), the wife of the main doctor - Dr. Laurent (Charles Boyer) - at the hospital, receives a letter