Eye chart smaller symbols until the person cannot identify the symbols. The smallest symbols that can be reliably identified is considered the person's visual acuity. The Snellen chart is the most widely used. Alternative types of eye charts include the logMAR chart, Landolt C, E chart, Lea test, Golovin–Sivtsev table, the Rosenbaum chart, and the Jaeger chart. Charts display several rows of optotypes, which are standardized symbols for testing vision. Optotypes are usually letters, numbers, or geometric symbols. Each row of the chart depicts optotypes of a different size. Typically the largest optotypes are in the top row. The optotypes become progressively
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