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 Eye of the Giant is forced to admit the truth, but Grover refuses to abandon his expedition on the word of people who claim to have travelled through Time. In order to prove his story, the Doctor suggests that Mike show Grover the “statue” in the pit, which the Doctor believes is in fact a dead alien in a life support suit. Upon arriving at the pit, the Doctor studies the statue for himself and finds a storage unit containing two Semquess drug vials and one empty space; he concludes that the third vial must have broken open in the past, releasing chemicals which