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 looks forward and back". On 12 May 2013, a week before the official premiere of "The Name of The Doctor", it was announced that 210 "Doctor Who" fans in the United States had received their Blu-ray box set of the second half of the seventh series early due to a production error. After successfully requesting that they not reveal the plot, the BBC sent the recipients copies of an interview with the cast. Moffat later complimented the "210 of them, with the top secret episode in their grasp – and because we asked nicely, they didn't breathe a word." "The