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
The Name of the Doctor their friend, time-travelling alien the Doctor (Matt Smith), to come the planet Trenzalore, the site of the Doctor's future grave. The Intelligence attempts to force the Doctor to open a door leading to his time stream, which the Intelligence intends to interfere with to undo all of his victories. "She Said, He Said" is a mini-episode that acts as a prelude to "The Name of the Doctor", in which the Doctor and Clara each have a monologue about how little they know about each other and that they discovered each other's secret at Trenzalore. It was released on on BBC