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
The Name of the Doctor The Name of the Doctor "The Name of the Doctor" is the thirteenth and final episode of the seventh series of the British science fiction television series "Doctor Who". It was first broadcast on BBC One on 18 May 2013. It was written by Steven Moffat and directed by Saul Metzstein. The episode was watched by 7.45 million viewers in the UK and received positive reviews from critics. In the episode, an entity called the Great Intelligence (Richard E. Grant) kidnaps Victorian-era detectives Madame Vastra (Neve McIntosh) and Jenny Flint (Catrin Stewart) and their butler Strax (Dan Starkey) to force