Snellen chart H, K, O, S, 3, U, Y, A, C, E, G, L, 2. The normal Snellen chart is printed with eleven lines of block letters. The first line consists of one very large letter, which may be one of several letters, for example E, H, or N. Subsequent rows have increasing numbers of letters that decrease in size. A person taking the test covers one eye from 6 metres or 20 feet away, and reads aloud the letters of each row, beginning at the top. The smallest row that can be read accurately indicates the visual acuity in that specific
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