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
Name-letter effect in preference between subjects would have to be based on whether the letter occurred in their name. For example, take the fictitious pair Irma Maes and Jef Jacobs as shown in the table. The first stimulus is A and U: the last letter of Irma's first name and a letter not in her name. The next stimulus is M and D: the penultimate letter from Irma's first name and a letter not part of her name. As can be seen in the table this is repeated for the remaining letters of Irma's first name. The letters of her last name