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 Name of the Doctor Name of the Doctor" received overnight ratings of 5.46 million viewers on BBC One. When viewers who watched the episode later on were taken into account, the figure rose to 7.45 million, making "Doctor Who" the third most-watched programme of the week on BBC One. The episode received an Appreciation Index of 88. The episode received positive reviews. Mark Snow of IGN gave the episode 9.1/10, praising the final conversation between the Doctor and River Song, as well as the revelation about Clara; however he noted that the Great Intelligence was "a little underwhelming" and "not very threatening", and that